"Uncur" can also be used in a manner of which you really truly care but you only want to mask your feelings to sound careless and tough. (Try saying it while shrugging)
Quaneesha: J-DAWG!! Where you beeeeeeen?? I made some fried sssshiken and cone breeaaaheeaad fo ya.
*drops plate on floor*
AWWWW SHEEEEET, dayam baby I'm sorray.
John: (shrugs) Uncur.
A member of society which is seen as an outcast, knows nothing, and lives under a rock. Often this person is seen as stupid and is almost always ignorant as to what goes on in the world. They have little to no knowledge of how to interact with others.
She said that Mozart copied off of Rihanna? What an uncultured swine!