bag of yeast Share definition Flag Meaning - beast - which does not mean good or awsome it means a child molesting monster, a paedophile. "A fuckin' dirty little bag of yeast" "Fuck him, he's just a bag of yeast" bag of yeast by Klausey September 15, 2009 0 0 Get merch Get the bag of yeast mug. Buy Now — $32.95 See more merch