A term used when a person has plans to do really good at something they really like. A bragging notion that you are going to be better than everyone else at the activity.
Steve: Hey Mike, you want to play some Halo tonight?
Mike: You better watch it Steve, cause I'm going to rock out with my cock out!
A term used for partying, rocking, party-boying, jamming, or during the acceptance of an invitation. Also can be used if one is about to perform something they are accustomed to. (in some scenarios, this requires alot of confidence, or Swagger)
Guy 1: "Yo bro, we're goin' to Trish's party. You in?"
Guy 2: "Hell yeah! I'm gonna rock out with my cock out."