the term given to a "guido" or other annoying person in a room. If one or more "squids" are in a room the room itself can be considered an aquarium. If this is the case, then you rub two finger together as if feeding fish and say, " WOW, i didn't know it was feeding time at the aquarium".
Hey Caitlin, a thought we were going to a bar, not the aquarium. I don't have any fish food on me... Those guys are total squids.