I don't know where she got it from but I've adopted it myself now: My girlfriend calls these disposable characters "Malcolms".
You know the scenario; when the crew of the enterprise are about to beam down to an unknown planet and there'll be Kirk, Bones, Spock and some guy who's never been in it before.
"There's the Malcolm!" the missus will say. And, sure enough, guess who ends up getting killed?
