Having an indented or "cleft" chin that when you stare at carefully enough resembles the human ass.
I could swear Kevin had a piece of toilet paper stuck to his ass chin. Do you think he can really poop from it ?
di Steve the Kevin Hater 27 ottobre 2007
4 more definitions
Where you have a very deep cleft chin and it looks like a ass crack.
The advantage of an asschin is: you can blow your nose and wipe your ass at the same time>
di asshat 22 gennaio 2003
jackass who torments aol chatrooms
damngoodlookin is an asschin
di bobby jane 18 gennaio 2003
A fold of fat underneath the jaw line caused by an excess of body fat. Double chin.
"That fat muthafuckah has a humongous ass chin!"
di Tunmy AuGratin 23 febbraio 2006