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1 `B' TRAIN: A TRACTOR pulling two SEMI TRAILERS. The lead unit having a FIFTH WHEEL at the back to attach the second SEMI TRAILER or PUP. (For photo: See `RIG'.)  BACKHOE: A, farm tractor with an EXCAVATOR on the back, and, usually, a bucket, front end loader, on the front.
BZ. Short for Bozo, another person trying to occupy the same physical space that I am trying to occupy at the same time. First used by downhill skiers and polite taxi drivers. Inspired by TV police dispatcher command to See the citizen at 1st and main, substituting the real thought.