stupid

(noun) a person who is not very bright. Synonyms: stupid person, stupe, dullard, dolt, pudding head, pudden-head, poor fish, pillock. Example: "The economy, stupid!."

(adj) lacking or marked by lack of intellectual acuity. Synonyms: stupid (vs. smart).

(adj) in a state of mental numbness especially as resulting from shock. Synonyms: dazed, stunned, stupefied, stupid(predicate). Examples: "He had a dazed expression on his face." "Lay semiconscious, stunned (or stupefied) by the blow." "Was stupid from fatigue."

(adj) lacking intelligence. Synonyms: unintelligent (vs. intelligent). Example: "A dull job with lazy and unintelligent co-workers."