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To preform a u-turn in a car/truck/van very poorly. A half handbrake turn, a 3 or more point turn or to hit something while turning around.
"I just gotta buck a u-boat over there and we're good."

"That was brutal, way to buck a u-boat buddy."
by StonedPimpSO February 24, 2009

Words related to buck a u-boat

180 buck a uboat buck a u boat uturn u turn u-turn