One who, or that which, backs; especially one who backs an entrant in a contest, or who supports an enterprise by funding it.
One who robs others in a lawless area, especially as part of a group.
A runner who covertly joins a race without having registered as a participant.
An outlaw.
An aircraft identified as an enemy, but distinct from "hostile" or "threat" in that it is not immediately to be engaged.
One who cheats others.
To rob, or steal from, in the manner of a bandit.