shmoompa Share definition Flag A girl fat shorter than 4 foot 5 that looks like a man.The word shmoompa comes from half shman half umpa-lumpa. chris stellings girlfriend is such a shmoompa. shmoompa by bendaroo February 22, 2009 0 0 Get merch Get the shmoompa mug. Buy Now — $32.95 See more merch