The opposite of a boner.
An ugly chick walks by...UNBONER!
by K4hmboy September 22, 2009
2 more definitions
When an otherwise enjoyable event is ruined by an unforseen negative event.
So I'm finger blasting this chick and she farts. Unboner.
by MacApedia November 11, 2010
Said by WergBurg aka MrWerg aka djy1991 during his first stream on ustream after switching from livestream. His boner unbonered to help him pull out his new computer from its case.
It boners and unboners on command.
by Shouhei July 23, 2010