Batty flap

Batty means bum and flap usually means the cheeks. Its an urban British slang and for some strange reason others have gotten a different meaning of it. Like how the word faggot which is actually a name for a type of food some how got converted into a nasty insult towards homosexuals by people. Usually it is just used because its funny and more polite than saying arse cheeks.

I will shove that up your batty in a minute. Explanation: I will shove that up your ass - Used when somebody is annoying you with something.
My batty flaps are flapping because I just farted. Explanation: My bum cheeks are shaking from my farting.

Flap carnival

Collective noun for a group of Flappers, Gash Gorillas or Clunge Trumpeters. Usually over 40 and looking for a younger man for the night. They often travel in groups and if you walk into a bar where there is more than one group - you've come across a Flap Carnival

Johnny: Jesus Dave, what IS this place?

Dave: Just a singles bar mate, why?

Johnny: 'Coz it's like a clungeon nightmare, it's a Flap carnival in here

Dunkin’ Flaps

When you squat until your labia are submerged in a bowl, cup (from KFC or Wendy’s), or barrel (for the flap dunkin connoisseurs) of mashed potatoes.

Jessica M. filled her step dad’s pool with mashed potatoes so the entire town can partake in the Dunkin’ Flaps party.

I woke up this morning to the lovely scent of garlic mashed potatoes in the air. You can imagine my disappointment when I came down to see Jessica squatting on the kitchen table, dunkin flaps.

flap the wings

To flap one's arms in an unsuccessful attempt to prevent objects from falling.

Look at that klutz! All of those books are falling all over the place! Look at him flap the wings! (Making sounds like a chicken, to the unfortunate person): Bok, bok, bok!

grease flaps

a flap of like I don't even know bruh i- i wanna say like nut sack flap but that- or something like, nahhh I think we can make it better than that, cuz it needs to be wet for some reason, its just like a flap on ur back that's always wet for some reason. grease flaps is a flap of grease

man: dude this "grease flaps" is really leakin everywhere.

Flap Truffle

When you're eating a girl out and find some toilet paper in her snatch.

Man, I was eating out that girl I met at the bar and she had a huge chunk of flap truffles in her snatch.

floppy flaps

Pouring ketchup onto a girls flaps and then proseeding to insert your penis into the vagina

Bro I gave my girl floppy flaps last night