DNC
Initials for: "Dude, Not Cool". A quick way to express annoyance or anger with a friend or associate when their stupidity or incompetence has reached a level that has left you without words, or is otherwise unacceptable.
Joe: Hey, Mike! I saw Matt's daughter with some of her friends at a club last night. I would totally hit that.
Mike: Don't ever tell him that story. You shouldn't have even told me; that's a total 'DNC'.
OR
Josh: Dude, last night at dinner, I accidentally told my mom that you had a crush on her.
Pete: What the fcuk? DNC.
Mike: Don't ever tell him that story. You shouldn't have even told me; that's a total 'DNC'.
OR
Josh: Dude, last night at dinner, I accidentally told my mom that you had a crush on her.
Pete: What the fcuk? DNC.
