Green’s Dictionary of Slang

U-ie n.

also U-ee, U-ey, youie

[1960s+] (orig. Aus.) a U-turn; thus chuck/bang a U-ie, to make a U-turn.

In phrases

cut a U (v.)

[1980s] (US) to make a U-turn.

do a U-ie (v.) (also do a U-ey, do a youie)

to make a U-turn.

hang a U-ie (v.) (also hang a U-ey, ...Ulysses, …yoo-ee) [hang v.7 + U-ie n.]

1. [1960s+] (orig. Aus.) to make a U-turn.

2. [1990s+] to urinate [pun on sense 1 as well as initial letter of SE urinate].