Tub means tall ugly
blonde. It's an acronym. There are a lot of these out there. Especially the ones that from the back look cool, and you're
like, hey maybe I'll pick up that hottie. Then she turns around and you're just
straight outta luck son.
Guy 1: "That
blonde over there looks
awesome from behind - I'm trying to get a look at her face"
Guy 2: "Yeah man,
hope she doesn't turn out to be a tub"
Guy 1: "Damn she turned around and she's totally a TUB!"