A heterosexual with the stereotypical tastes or affectations of a homosexual
I was sure that he was gay because of his love of Judy, Liza and Barbra, but it turns out he's just a straigh-mo.
adj) Something questioning the sexuality of a man. Used the same as homo. Connotates men who fuck other men. Orginated in the box office hit Brokeback Mountain popularized by the comic strip the Boondocks.
Person A: Yo son me and my homboys went skinny dipping yesterday.
Person B: yo that is straigh brokeback