dumbski

Playful American slang for a stupid or clueless person, with the -ski suffix adding a mock-Slavic or mock-formal flair that softens the insult into something more teasing than cruel. It's the kind of word you'd throw at a friend who just locked their keys in the car or forgot a painfully obvious fact — affectionate ribbing more than genuine contempt. The -ski suffix appears in several American slang coinages as a casual intensifier or humorous marker.