Poon Tonic Share definition Flag An alcoholic drink that will get a girl drunk to help you get laid. Dude what are you drinking, it's stout as fuck? It's poon tonic, I'm gonna go give it to that slut over there. Poon Tonic by teitezzy January 3, 2011 0 0 Get merch Get the Poon Tonic mug. Buy Now — $32.95 See more merch