thumpfluid Share definition Flag the stuff that squirts out when you elbow drop a pregnant womans stomach. "Macho Man Randy Savage did a seminar at the maternity ward last week and there are still thumpfluid stains all over the walls." thumpfluid by glimpze740 July 4, 2008 0 0 Get merch Get the thumpfluid mug. Buy Now — $32.95 See more merch