dumb as a stump

Extremely mentally slow

Dumb as a stump describes someone extremely stupid or slow-witted.

The comparison is to a tree stump—a thing with no brain, no capacity for thought, just inert wood.

He's dumb as a stump, but he means well.

The phrase is folksy and rural in flavor, often used with affection or resignation rather than malice.

Related

stupid · obtuse · simple-minded · thick as a brick · unintelligent · thick-skulled · witless · ignorant · vacuous · sharp as a marble · dull as dishwater · brain-dead · lights are on but nobody's home · not the sharpest tool in the shed · not the brightest bulb · dense · idiocy · blockhead

Opposites
intelligence/cognitive ability

dumb as a stumpbrilliant

Intensely bright or gifted

genius · sharp as a tack · smart as a whip · intelligent · clever

evaluative tone

dumb as a stumpcream of the crop

The very best

sharp as a tack · top-notch · smart as a whip · exceptional · bright as a button

Family

dumb, stump, dumber, dumbest, dumbly, dumbness, dumbed, dumbing, stumps

Familiarity
Top 200,000
Profile
Known to kids · Timeless · Concrete · Negative · Everyday, not technical · Rated G