When you're driving in the same direction for a while, and you realize you've forgotten something and have to
go all the way back, you must "throw a
u-ball".
U-ball is just another word for
u-turn but with u-balls you cover a much greater distance.
J:
Paul, did you remember
the money?
Paul:
Aw shit. I forgot. Now I have to throw a huge u-ball. Fuck!