2.A fat, annoying kid that goes to you school, tries to act cool in many ways but fail HORRIBLY.
2. "DUDE THAT GUY IS SUCH AN ALEX CHOW!"
-Stop being such a chow.
(normally another word is inserted between "a" and "chow", ie. fucking, stupid, dirty, etc... feel free to insert more than one word, to mix it up, if you like!)
(Also, it doesn't always have to be used in a bad way)