Definitions by @n0+3r p3r50n

Thonk 

A thong lost in someones fat ass. (donk)

"Dude she gotta a donk so big that thong looks lost in there!"
"Man thats what you call a thonk cause indiana jones couldn't find that thong lost in that fat ass!"

Thonk by @n0+3r p3r50n April 26, 2010