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."
"That was brutal, way to buck a u-boat buddy."
by StonedPimpSO February 25, 2009