To drive your partner into the headboard with repeated deep thrusts during wild, out-of-control passion.

The thing at the back of your bed.

To root a girl really hard and the bed head board banging against the wall repeatedly waking your neighbors up.

Object that is struck repeatedly by a girl's head during a fuck session.

a girl so ugly you have to stare at the headboard in order to have sex with her

When your bang session is so good that you destroy the headboard on the bed. Extra points for putting splinters in her hair.

the loss of intelligence or capcity for logical thought resulting from prolonged bashing of the head against a headboard during vigorous sexual intercourse; someone's brains have literally been fucked out