A genteel word girls use to describe themselves when they've been too slutty for their
man's liking. Often explained away by the 'good
girl' as it being that time of the month when women are at their most
horny.
"I'm sorry I was brassy the other
night at the dance when I was
dancing glued up against you and grabbing your arse and sticking my tongue down your throat, but we're
cool, aren't we?"