Krumbein Share definition Flag Adj. 1. One who deals in the wanton destruction of the dreams of children. 2. One who deals in krumbeins. 1. Pol Pot, what a regular krumbein, am I right people? 2. Hey, I heard that Josh kid is a krumbein, somebody should lynch him. Krumbein by Malcolmb May 1, 2008 Get the Krumbein mug.