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!"