A slang term for someone whos is extremely arrogant and full of one's self. Someone one who thinks they're better than everyone else.
These people are usually highly disliked by most people due to their big ego and arrogant attitude.
A synonym for this word is "the shit". "The Shit" means exactly the same thing.
"Dude, you look like a faggot. I look so much better than you, so shut up. That's why girls want me so much."
"Did you hear him? Yeah i did, he (is such a cocky shit / thinks he's the shit), he thinks he is so cool but he's not."