A shortened version of legitimate. Commonly used by wrestling fans who are "in the know" aka smarks. Made popular by Rob Feinstein, and copied by many. Its usage is considered 'dumb' by intelligent types.
A word that a lot of douchey minors use because they think they're hot shit. It means "for real" or "Straight up". It is a very annoying word, especially when used by a white person.