Term used to call a person on Xbox Live a Random. Used when a person is a noob or is using a nubtube. Or simply just calling a person that no matter how hard you try always kills you in a video game.
Ipwnnubs - "Oh WTF, your a RandoCommando."
RandoCommando - "Just because I killed you 7 times in a row doesn't mean I'm a random."
