flatunkadunk 

A big, fat ass but it is flat like a pancake, instead of round like an apple.

Those jeans make Tilly's ass look like a flatunkadunk!

flatunkadunk by Sipowicz September 10, 2007

fadunkadunk 

a girl with a hughe gehtto booty, usually bigger than anything ever seen

damn check out that girl loquesha she got tha fadunkadunks

fadunkadunk by joe heregger January 26, 2005

flunkadunk 

Flunkadunk is a term coined by a young boychild named Dustin referring to a "big freaking poop"

Not all poops were created equal, after all.

Person One: I just made a turd, I'm so disappointed in myself.
Person Two: You brought shame on your family, bruh.
Person One: I'm so sorry.
Person Three: If only you had made a flunkadunk, then you wouldn't be obligated to commit Seppuku

flunkadunk by Nerd of the smart February 20, 2014

Fadunkadunk 

When a person is on the receiving end of large tits slamming hard and true on their skull during intercourse, with the comical delivery of a Fred Quimby Tom and Jerry skit.

I woke up in hospital after pulling a nine pinter at the dancing, the last thing i remember was that she was on top and the last thing i heard was fadunkadunk

Fadunkadunk by Joe Smiff January 27, 2024