Top definition
FOYB = fuck on yo bitch

fucking someones bitch . Her man probably insecure and you could easily fuck on his/somones bitch.
Playboicarti . "I might go fuck on yo bitch" he probably fucking somebody bitch cause i mean its carti what you gunna do?

Foyb = fuck on yo bitch
by Ypreee_zaddy December 27, 2016
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