Antonyms of adj smart_as_a_whip

1 sense of smart as a whip

Sense 1
brainy, brilliant, smart as a whip -- (having or marked by unusual and impressive intelligence; "some men dislike brainy women"; "a brilliant mind"; "a brilliant solution to the problem")

INDIRECT (VIA intelligent) -> unintelligent, stupid -- (lacking intelligence; "a dull job with lazy and unintelligent co-workers")

Similarity of adj smart_as_a_whip

1 sense of smart as a whip

Sense 1
brainy, brilliant, smart as a whip -- (having or marked by unusual and impressive intelligence; "some men dislike brainy women"; "a brilliant mind"; "a brilliant solution to the problem")
       => intelligent (vs. unintelligent) -- (having the capacity for thought and reason especially to a high degree; "is there intelligent life in the universe?"; "an intelligent question")