Green’s Dictionary of Slang

wife v.

1. (US prison) for a dominant prisoner to force another inmate to be his wife n. (3)

[US]G. Hayward Corruption Officer [ebook] Ch. 29: So that the in the closet homo thugs won’t be fighting each other over who is going to wife one of them.

2. (UK black) of a woman, to have a (sexual) relationship.

[UK]Skepta ‘We Begin Things’ 🎵 All the chicks in the hood wanna wife me / Black chicks, white chicks and the lighties.

In phrases

wifed up (adj.)

(US) to become someone’s wife.

[US]E. Acevedo Poet X 4: ‘Ayo, Xiomara, you need to start wearing dresses like that!’ / ‘Shit, you’d be wifed up before going back to school’ .