Cody is basically the name of every rude, conceited, and bitchy gay guy. Narcissistic and self-absorbed, Cody thinks he's the hottest thing around and that everyone should be in love with him, but he's completely delusional. He hits on straight guys and expects them to be attracted to him, only to be angry that they're not. Basically, Cody is self-centered and bitter, and he's constantly angry at the world for not being in love with him despite his terrible attitude.
(At a gay bar)
Guy 1: I just had the weirdest encounter of my life
Guy 2: What happened?
Guy 1: This stuck-up douchebag was hitting on me, but got super angry and rude when I wasn't interested
Guy 2: I'll bet his name was Cody
Guy 1: How'd you know?