Noun A guy who will do anything, or pretend to be anything, and squash other people to further himself. Someone who is a tattletale or even willing to lie. Someone of low moral character when it comes to furthering themselves or their cause, including, but not limited to setting other people up. Not trustworthy.
Johnny will throw his best friend under a bus if it means he can make himself look better or further his own career. Watch out for him. He's a little squeege.