goombah (GOOM-bah) noun 1. Friend, accomplice, or crony. 2. Godfather or mentor. 3. Gangster or Mafioso. [Dialectal pronunciation of Italian compa, a clipping of compare (godfather, friend, or accomplice), from Latin compater, from com- (with) + pater (father).] -Anu Garg (garg wordsmith.org) "It... Sign in to see full entry.