Heg Share definition Flag (v.) When one vomits, then re-ingests, and vomits again. (n.) See verb; the product of verb. (v.) "ughh I think I just hegged!" (n.) "eww, my heg was disgusting last night." Heg by Mary! May 11, 2008 0 0 Get merch Get the Heg mug. Buy Now — $32.95 See more merch