a loud remark one makes when feeling a sense of regret, or otherwise feeling a need to make a 180 degree turn.
It can also be used when in an urge of making a funny noise
Rony was about to punch michael in the face, but when he saw him holding a knife, he made a U TURN and got the fuck out of there.
When you take a 12 inch double headed dildo, put one end in a girls vagina and the other in the anus. Thus the dildo forms the shape of a "U"
Oh man, i was rammin my chick with a double headed dildo last night and i put the shit in her ass, so i fuckin pulled a U turn on that slut