heffer Share definition Flag 1. A huge fat chick. 2. Jessica. also see jelly rolls, obese, fatso, big mama, etc. etc. DUDE HAVE YOU SEEN JESSICA, SHES A FREAKIN HEFFER!!!! heffer by Miss RUDE as Hell September 21, 2005 0 0 Get merch Get the heffer mug. Buy Now — $32.95 See more merch