1 definition by urbandictionaryisawesome!!!!!

Armpit butt

When a girl wears a tank top and right between her chest her shoulder there is a flabby skin flap that looks like a butt.

"Dude, that girl is so hot!" "Naw bro, see her saggy Armpit butt? Ew!"

by urbandictionaryisawesome!!!!! January 25, 2010