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.