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 ?
von Steve the Kevin Hater 27. Oktober 2007
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>
von asshat 22. Januar 2003
jackass who torments aol chatrooms
damngoodlookin is an asschin
von bobby jane 18. Januar 2003