1. n. The totally kickass sergeant from Halo and Halo 2 who literally can't be killed. A sergeant in the United Nations Space Command. Played by voice actor David Sculley. He is most commonly known as Sergeant Johnson.
"Dear Humanity: We regret being alien bastards. We regret coming to Earth. And we most definitely regret the corps. just blew up our raggedy-ass fleet!" - Sergeant Avery Johnson.