A anti-social, typically alcohol-induced maneuver whereby a person will make a stealthy retreat from the bar or party without letting any of his or her friends know. This move is usually employed later on in the night when the person has had too many drinks and doesn't want to deal with telling everyone goodbye. Coined after the "throw a smoke bomb and retreat" method used by ninjas.
Brad: "Yo man, what happened to you at the bar last night, our crew got called up to do a karaoke song and you were nowhere to be found?"
Todd: "Yeah I was sort of drunk and just decided to leave."