quism Share definition Flag Old stale sperm that unexpectedly drips back out of a woman's vagina. Derived from a combination of the words "QUIM" and "JISM" I was eating some old slut's gash out the other day, and I got a mouth full of quism. quism by caniswalensis June 15, 2006 0 0 Get merch Get the quism mug. Buy Now — $32.95 See more merch