When a guy has a little patch of hair directly below his lips. It's not a full goatee. When a guy goes down on a girl, this patch of hair brushes up against the chick's taint. Also known as a soul patch.
by Dan de Mann November 12, 2006
A taintbrush is when someone walks around on a hot summer day, saturating the taint and its hairs with sweat. Once saturated, it is then used to paint on a sleeping person's forehead.
My roommate used his taintbrush on his sleeping girlfriend and blinded her by getting sweat in her eyes!
by Siegle September 21, 2005