U + turn, from the similarity to the shape of the letter U.
From
Wiktionary
U-turn Sentence Examples
The car had quickly made a U-turn and followed Fred, not taking care to disguise its actions.
Skateboard and U-turn - Watch the Zhu Zhu Pet do some moves in its U-turn skateboard park.
Because of the "u-turn" nature of this course, there are several opportunities to shoot in the gaps that you produce and gain yourself bonus points, but beware of accidentally missing and getting yourself in more trouble.
Police initially pulled Rourke over after making a U-turn at a red light, then driving erratically.
U-Turn: This follows a detour clue and requires the team who receives it to go back and complete the challenge that was not originally chosen or completed.