Vag-Cav Share definition Flag Another name for vagina. Short for vaginal canal. used for fucking, and for calling out our friends. "hey Brian quit being such a Vag-cav" "Man i bet Katy has a cutle little Vag-Cav Vag-Cav by Rob O. August 5, 2009 0 0 Get merch Get the Vag-Cav mug. Buy Now — $32.95 See more merch