Thingymabober Share definition Flag A word used when you cant think of or know what something is called. Commonly used when talking quickly or when in a rush. Person 1: omg did you see that thingymabober?person 2: yh i know! Thingymabober by loopycheese January 29, 2014 0 0 Get merch Get the Thingymabober mug. Buy Now — $32.95 See more merch