In any sort of Real Time Strategy or Role Play Game, to go out and attack neutral units for gold and experience, as an alternative to attacking opposing players early on.
Blue: No, let's creep. I want my Hero at least level 3 before we take them on.
You: "Creep", your aquard inappropriate creepy sexual advancements toward me are unwanted and unneeded. It is unfortunate that you can't seem to get over me and continue to cyber stalk me.
Later described by those girls as a "creep"
Male: Someone who watches the movie.
Male: Creep, what the hell?