A rare disease developed by people who play Call of Duty. Usually used as an excuse for missing work in order to play more video games. It is most commonly developed by someone who has stayed up all night playing Hardcore Search and Destroy and is ever so close to reaching level 70.
Adam: I can't make it into work today I've got the COD.
Boss: OK, you better stay home until you get better.
George: Where's Adam today?
Gord: He's at home with the COD.
George: That bastard he's going to prestige before me! I think that I'm going to stay home with the COD tomorrow.