Today's Urban Dictionary word of the day is Star Trek-related, for some odd reason ...
Expendable characters. Usually say one line or less before being killed in a plot-convenient manner.
Most often seen in classic 60's Trek.
"Damn, find me another one."
I remember seeing an improv show in Halifax in the early 90s, in which the troupe used the name "Ensign Toast" for the character that an audience member, pulled onto the stage to play along with the Trek-clad performers, would play.
You can guess the colour of the jersey they gave him to wear.