Definitions by WAG1-GET-TAH-NOEZ.

bum chin 

a chin that looks like an arse :)
jordan brackenbury chloe rodway

*mother giving birth*
DAD: OMG, ITS GOT TWO HEADS
NURSE: ¬.¬ no. its being born chin first.
DAD: HOLY CRAP, HE HAS A BUM CHIN, he might aswell be gay! :'(

bum chin by WAG1-GET-TAH-NOEZ. August 5, 2008