Hergie Share definition Flag Slang word used by people in Fishtown PA, originating from Pittsburgh PA for a hoagie, grinder or sub. Often abbreviated in context as Herg, or Hergs. Yo, let me get a turkey hergie.or This jawn makes the best hergs. Hergie by BooBooDan June 24, 2012 0 0 Get merch Get the Hergie mug. Buy Now — $32.95 See more merch