Theoretically a push
up done in a handstand. In actuality, a push
up merely done without
wearing underwear. So, when a guy is bragging that he can do commando push
ups, it may not be what
Guy: Guess what? I did 12 commando push ups last night.
Girl: Really? What's that?
Different Guy: Oh, shut up, dude. It just
means he did push up 'au naturale'.