When a mans beard brushes against a woman's anus (intentionally and unintentionally) during oral stimulation of the genitalia; cunnilingus, fellatio.
by The_butterscotch_bandit September 06, 2017
The step before grinding. When a girls butt is all up in a guy's "you know" in the context of dancing.
They were "Booty Brushing" at prom because they were just friends.
by akmjecacd February 17, 2011
When somebody accidentally walks past you when you are sitting, brushing their but across your face.
by chodebro January 27, 2015