Someone who slap chodes, or acts like a complete douchebag, whiner, asshole, etc. Chode Slapper is a term used to describe anyone with unlikeable traits or an abrasive personality.
Bob: Dude, Dylan totally stole my wallet yesterday.
Tom: What a chode slapper.
Jessie: God, my boyfriend is being such a chode slapper, he won't buy me prada shoes.
Mara: What a dick.
Tom: The nazis were such chode slappers.