The
Jamaican vernacular which means "to cheat on your
male significant other". (To cheat on your man, boyfriend,
husband, fiance etc)
Girl: "He wasn't treating me good, so mi
bun him!"
This phrase was made even more popular by the song "
Bun Him'" by Jamaican dancehall artistes Macka Diamond and Blacker. The song speaks about a female who complains that her significant other is ill-treating her and cheating on her, to which her friend responds by encouraging her to 'bun him' (cheat on him)