2. To defile any sort of normal sexual intercourse.
3. To masturbate your asshole.
4. Proper noun; any homosexual Brazilian male stripper.
2. While enjoying missionary-style sex with his girlfriend, Steve subsequently took a massive shit over her face.
3. The girl enjoyed to mengo while her parents were not home, as shit would fly all across the walls in her room.
4. The Mengo was brutally assfucked by a biker gang.