Verb: To simulate the motion of masturbation but the genitalia remains flaccid and covered by one's hand.
Chad: Bro stop jerking off in the living room there are girls here.
Brad: It's not weird because it's a guince, I don't have a boner.
Chad: Oh you're guincing, that's chill.
Brad: It's not weird because it's a guince, I don't have a boner.
Chad: Oh you're guincing, that's chill.
by poopsterroo November 03, 2022