A extra bone on the human body that only male's have. It has the ability of appearing and disappearing whenever the male is exited. the "boner" sometimes doesn'
t appear when it's supposed to, for example, it
always appears in class presentation and never when you'
re actually going to have sex.
Male 1: dude, i had a boner yesterday on the middle of a class presentation, everyone was laughing about it...
Male 2: aw
man, i was hitting it up real nice with this girl but it decided to disappear on the middle of the action
man.