At six feet even, Fluttershy was the tallest member of her small circle of friends, and one of the tallest mares in Ponyville period. She was used to being the tallest. It wasn't necessarily something she enjoyed – she would have much preferred being the smallest and standing out less. But she was tall. She was used to being tall, and, more relevantly, she was used to being the tallest, which is part of why she somehow managed to not see Gilda coming until she had crashed facefirst into something soft and musky.

“Hey! Watch where you're goin', shortstack!”

Fluttershy swallowed heavily, and then slowly turned her gaze up.

And up.

And up.

Gilda was gigantic. She had to be at least ten feet tall – Fluttershy had never been good at judging relative heights, but what was more relevant right now than any numbers was the fact that their relative heights aligned her head perfectly with Gilda's cock and balls.

Her very large cock and balls. Her bottom struggled impotently to contain her massive girth – although her bottom consisted of a pair of daisy dukes that Fluttershy was certain were at least half a size to small and a bright red thong, so “struggling impotently to contain her massive girth” was presumably the effect Gilda was going for. The zipper of the daisy dukes was on the verge of disintegrating from the strain of restraining her gigantic bulge, and the bottoms of her swollen balls peeked out from the legholes. Much like the undersides of her equally huge tits – each one at least twice the size of Fluttershy's head – jutted out from the bottom of her ill-fitting tank top.

Fluttershy found herself rapidly running out of synonyms for “big.” The only things about her that were even remotely small were her clothing. She swallowed nervously.

“What, is there something on my pants or what?” Gilda frowned, leaning down to get a better look at the (much, much, much) shorter mare. “You got a fuckin' problem with me, scrawny?” She prodded Fluttershy in the chest, her taloned finger holding enough force to send Fluttershy sprawling backwards onto her ass. “Fucking pathetic. Kinda cute though. You're Fluttershy, right? Dash's friend?” Fluttershy nodded silently, jaw slack in horrified awe. “Yeah, thought so. You look pretty much exactly how Dash described you. I still can't get over how fucking tiny you ponies are, though. Every time I come down to Equestria it's like stopping in to Midgetland for a visit.” Gilda rose back to her full height and stretched languidly, causing her clothing to creak dangerously. “Oh, and no one makes clothing in reasonable sizes without having to pay out the fuckin' nose, either.” She reached down and gave her balls an idle scratch as her tail twitched back and forth in irritation. “And, I mean, I bought this outfit only a month ago and look at it now! Barely fucking fits.”

Fluttershy swallowed laboriously, blushing furiously and futilely struggling to avoid staring at Gilda's prodigious package. “Um. Hi?”

Gilda raised an eyebrow. Her eyes drifted to Fluttershy's, and then followed her stare, and then grinned lasciviously. “Like what you see, shortstack?” She crouched down and leaned in close, her head dwarfing Fluttershy. “Wanna see more?” she whispered, before standing back up, and up, and up, as straight and tall as she was physically capable of, arms tightly at her sides and legs shoulder-width apart. She closed her eyes and inhaled slowly and languidly, and then opened one a crack, looking directly into Fluttershy's. “Keep your eyes on the prize, shortstack, because things are about to get fun.”

Fluttershy's gaze slowly travelled down, settling squarely on Gilda's cock.

It twitched.

Fluttershy had read in books about situations where something happened and everything seemed to slow down, like time had come to a crawl. What occurred next was the opposite of that. Gilda closed her eyes, clenched her fists tightly, there was a creaking noise, and then a ripping noise, and then suddenly her pants and underwear weren't.

“Aw, yeah. Zero to fully erect in eight point two seconds. New record.”

That was the other, probably more noticeable thing. Proportionally speaking, if Gilda had been the size of a normal pony, her penis would have been around two to three feet long. Gilda was decidedly not the size of a normal pony, and her penis, fully erect, was at least the size of Fluttershy. Probably bigger.

Fluttershy stared, jaw hanging slightly agape. This massive pillar of dark red flesh wobbled in the air before her, like nothing she'd ever seen before in her life. Well, that wasn't entirely accurate – it had elements of dog penis (which she was familiar with from her veterinary work) and it had elements of horse penis (which she was familiar with for obvious reasons). It jutted violently out of a sheath, thick and meaty, before widening into a massive, throbbing, veiny knot, at least the size of Fluttershy's head, if not larger. Slightly farther up its knot was another, smaller knot, and above that, about halfway up the gargantuan length was a third bulge, more like a medial ring than a knot. The rest of the length tapered slowly until it reached the head, which flared out again as wide as the first knot and then tapered to the point, like the head of a dogcock and the head of a horsecock all at once. It was absolutely gigantic – even shrank down to the size of a pony it would have been absolutely absurd, but on someone Gilda's size, calling it absurd was an understatement as immense as it itself was. And that was completely ignoring her balls, each one easily the size of a very large beach ball. The whole thing, from balls to shaft, bulged with throbbing, pulsing veins, each one at least as thick as one of Fluttershy's arms. Gilda's package completely and utterly dwarfed Fluttershy beyond what words could describe.

Gilda's vision moved from her penis to Fluttershy, her grin slowly widening. “Like what you see, shortstack?” Fluttershy could only respond by continuing with her dumbfounded stare, which prompted Gilda's grin to widen even further. “Man, I love coming down to Equestria so much. Makes me feel so fuckin' huge. Would you believe that up home I'm considered a runt?” She knelt down, once again leaning close to Fluttershy, her face inches from Fluttershy's own. The heat of her breath was dwarfed by the moist, musky heat of her cock, like fire and sex and power, overwhelming Fluttershy's meager senses with its sheer magnitude. Gilda whispered directly into her ear; “Well, just you fuckin' wait until you feel the whole thing inside'a you.”

Fluttershy's eyes shrank to pinpoints. “What?!?!”

“Well, yeah, what'd you expect? I'm not gonna destroy my only pair of pants just so you can give me fuckin' blue balls.”

“No!” Fluttershy shouted, desperate survival instinct overriding the sheer intimidation factor of Gilda's girth. “There's no way that will fit inside of me! There's no way even part of it will fit inside of me! It's bigger than I am!”

“And?” Gilda shrugged nonchallantly. “I've fucked smaller'n you, and they took it just fine. You sure you're not just being a little pussy?”

Fluttershy opened her mouth to once again object, but was immediately cut off by one of Gilda's clawed hands darting over her mouth. “Yeah, this conversation is getting old, and I am so fuckin' horny. Now, are you gonna fuck me? Or are things gonna have to get rough?” Fluttershy shivered. “Yeah, thought so. If it makes you feel better, you can just, like, blow me or something. But I'm getting off one way or the other. And trust me when I say that you don't want the other.” Gilda leaned even closer, her beak directly beside Fluttershy's ear, and her penis overwhelming Fluttershy's world. “I mean, unless you want me to just use you as a cock sock until I break you. Because those are your options. Either you be nice to me, or I be very not nice to you.”

Futtershy shivered again, though not with fear.

Gilda grinned.

“Now. Let's get started.”

Author's Note

Gilda episode only the problem is she is too sexually agressive and yeah, she's pretty good at dicking but it's exhausting trying to keep up and nobody can work out how to tell dash she's too pushy,

This one. Holy shit, this one. It took an epoch to finish but damn if it wasn't worth every day of work. At 1300+ words, I literally had to force myself to call it done or else it would have gone way beyond what could reasonably be called a drabble.

The prompt was actually the first prompt I got, before sending prompts for flash-fiction to my tumblr was a thing, and it really lent itself less to a drabble and more towards being a complete pornographic rewriting of Griffon the Brush Off, with Gilda's problem being not that she was an asshole, but that she was overwhelmingly sexually aggressive. The macro and futa aspects are all me, because I have a fondness for those two subjects (in case you couldn't tell. I am rather subtle about it cough cough.)

Out of all the drabbles thus far, this is the first one I feel would benefit from being expanded to a full fic rather than being left on the punchline.