simpleton

A simpleton is an idiot — a person without much common sense or intelligence.

This is one of many words — such as moron, dummy, and dimwit — that insult a person's intelligence. A simpleton is the opposite of a genius. However, the word simple implies more than lack of intelligence; it suggests being innocent or naive too. So a simpleton could be considered a hillbilly or yokel as well as a dullard or dunce.

Definitions of simpleton
  1. noun
    a person lacking intelligence or common sense
    synonyms: simple
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    types:
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    airhead
    a flighty scatterbrained simpleton
    dimwit, doofus, half-wit, nitwit
    a stupid incompetent person
    dingbat
    a silly empty-headed person
    boob, booby, dope, dumbbell, dummy, pinhead
    an ignorant or foolish person
    fool, muggins, sap, saphead, tomfool
    a person who lacks good judgment
    changeling, cretin, half-wit, idiot, imbecile, moron
    a person of subnormal intelligence
    nebbech, nebbish
    (Yiddish) a timid unfortunate simpleton
    nincompoop, ninny, poop
    a stupid foolish person
    forgetful person, scatterbrain
    a flighty and disorganized person
    schlemiel, shlemiel
    (Yiddish) a dolt who is a habitual bungler
    schlep, schlepper, shlep, shlepper
    (Yiddish) an awkward and stupid person
    schnook, shnook
    (Yiddish) a gullible simpleton more to be pitied than despised
    sheep
    a timid defenseless simpleton who is readily preyed upon
    space cadet
    someone who seems unable to respond appropriately to reality (as if under the influence of some narcotic drug)
    square
    someone who doesn't understand what is going on
    dolt, dullard, pillock, poor fish, pudden-head, pudding head, stupe, stupid, stupid person
    a person who is not very bright
    twerp, twirp
    someone who is regarded as contemptible
    berk
    a stupid person who is easy to take advantage of
    buffoon, clown
    a rude or vulgar fool
    blockhead, bonehead, dunce, dunderhead, hammerhead, knucklehead, loggerhead, lunkhead, muttonhead, numskull
    a stupid person; these words are used to express a low opinion of someone's intelligence
    flibbertigibbet, foolish woman
    a foolish, flighty, and overly talkative person
    bozo, cuckoo, fathead, goof, goofball, goose, zany
    a man who is a stupid incompetent fool
    klutz
    (Yiddish) a clumsy dolt
    meshuggeneh, meshuggener
    (Yiddish) a crazy fool
    morosoph
    a learned fool
    putz
    (Yiddish) a fool; an idiot
    wally
    a silly and inept person; someone who is regarded as stupid
    type of:
    individual, mortal, person, somebody, someone, soul
    a human being
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