Nut plunger Share definition Flag When the water level in a toilet is extremely high, so high in fact, when you sit down to take a dump you nuts get wet. Guy 1: "Why are your pants wet?" Guy 2: " Fuck, that toilet in the Wal-Mart was a nut plunger!" Nut plunger by Sir Wetpants April 30, 2010 0 0 Get merch Get the Nut plunger mug. Buy Now — $32.95 See more merch