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.
by Darkhed May 16, 2009
Get the DNCmug. 
by jhon gaming YT April 20, 2021
Get the DNCmug. by coldruse August 11, 2021
Get the DNCmug. by thatdbemory June 5, 2022
Get the dncmug. 
Person: You know who DNC is?
Person2:You mean do not cum? the famous minecraft player?
Person: Yeah that one
Person2:You mean do not cum? the famous minecraft player?
Person: Yeah that one
by Moshemag June 9, 2021
Get the DNCmug.