Flubbermenschnooker Share definition Flag To put Jello in one's socks.Often done as a prank, fashion statement, or pure chaotic neutral act. Dude, I just Flubbermenschnookered Leonardo De Caprio's socks when he wasn't looking. Flubbermenschnooker by Jake & Sam August 27, 2021 Get the Flubbermenschnooker mug.