Gwamp; the action of placing ones hand in a "cup" shaped position against ones own butt crack and farting in ones hand, then immediately grasping her hand shut to capture the stench and "throwing" the dart cloud into your friends face causing them to directly inhale your fart. Also known as "cuffing" or "farty mcfly's or johny cage gwamp balls.
by Gwampness monster July 18, 2014