It is an adjective meaning that something is really cool. Its similar to saying"killer" but it adds on a little zing to the word.
by Tyler Lambert May 16, 2009
An inexperienced (usually younger) partier who tries and hang with the big boys. Tells stories about things that never happened to try to be cool. will drink and smoke weed for about an hour turn white and give excuses about why he is the " ghost faced killah". Extra points if Candaian.
Ryan: Logan do you feel ok?
Logan: (starting to look pale) I'm cool I just need some air.
Lawrence: Damn fool, you're the ghost faced killah tonite!
Logan: (starting to look pale) I'm cool I just need some air.
Lawrence: Damn fool, you're the ghost faced killah tonite!
by lboog March 23, 2007