A quick and easy phrase to imply a friend or colleague should partake in fellatio (Oral Sex) with your genitals. The purest and most forthright abbreviation of 'Suck My Dick'. It's a conversation ender, an argument winner... the perfect dismissal.

A man who messes around with other men, but no one would ever know by looking or talking to him. Used by gay black men to identify masculine gay men or DL Brothas.