To go to an event after having consumed large amounts of alcohol and/or drugs
Trey Parker: We were lie "oh lets not do this" but then we decided to Charlie Sheen it and we were fine.
Matt Stone: we were just sheening our heads off!
David Letterman: They were both Charlie Sheening pretty hard.
Nickname given to bales of marijuana thrown overboard or out of airplanes. Origin is reportedly from members of the US Coast Guard in the area of Southern Florida.