v.1. To confuse someone by acting in a way that is contrary to what is expected: The pitcher threw a wild pitch that crossed up the catcher and allowed the runner to steal a base. The quarterback crossed us up with a fake handoff.
2. To cause some bicycle or motor vehicle to turn about the vertical axis so that it is no longer oriented in the direction that it is moving, often resulting in an abrupt stop. Used chiefly in the passive: On the last jump, my motorcycle became crossed up in the air, and I landed sideways.
3. To turn about the vertical axis so that one is no longer oriented in the direction that one is moving, often resulting in an abrupt stop: The car crossed up in the last turn, and the other car rammed into the side of it.