other man

other man (plural other men)

1. (informal) A man who is romantically involved with someone (usually a woman) already in a committed relationship with another man, especially a man having an affair with a married woman.
   • 2001, Sloan, "The Other Man", Pretty Together:

     I know you've got a man in the picture, but it hasn't stopped me yet / We've all been in one situation or another we regret / Now I'm the other man / No one's rooting for me / If I'm the other man / Nature will abhor me

• side nigga

Almost always preceded by the definite article ("the").

• home wrecker

• other woman

• anthrome, nathmore