beaufauxlai
Beaufauxlai means someone is "trippin" or "on some other shit." It is usually used when referring to a spouse or significant other, but it can be used in outside relationships.
Guy 1: Man, dog, my girl on that beaufauxlai shi.
Guy 2: Damn, man, she trippin that hard?
Guy 2: Damn, man, she trippin that hard?