Synonym: fool, half-wit, imbecile, moron, simpleton. Antonym: genius. Similar words: idiotic, idiosyncrasy, idiosyncratic, riot, biotic, riotous, patriot, chariot. Meaning: ['ɪdɪət] 
n. a person of subnormal intelligence.
n. a person of subnormal intelligence. 
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(31) He was grinning like an idiot .
(32) He sounds like a right idiot!
(33) I knew I'd been an idiot to stay there.
(34) You're acting like a complete idiot!
(35) I felt a perfect idiot.
(36) Get out of my sight, you idiot!
(37) That idiot loused up my chance of promotion.
(38) Idiot! You've dropped my watch.
(39) I felt such an idiot.
(40) Oh Richard, you're such an idiot!
(41) Not that switch, you idiot!
(42) What bungling idiot wired up the plug like this!
(43) You are behaving like a perfect idiot.
(44) Only an idiot would do that.
(45) Green-field was behaving like an irresponsible idiot.
(46) I didn't mince matters: I said he was an idiot.
(47) I had a close shave this morning, some idiot almost knocked me off my bike.
(48) Some idiot left the tap running in the bathroom and there's water everywhere.
(49) He's a right idiot.
(50) He's a ruddy idiot.
(51) He makes me out to be some sort of idiot.
(52) So he's a bit of an idiot, but he's still my bruv,[Sentencedict.com] ain't he?
(53) He'd have driven straight into me if I hadn't seen him first - the dozy idiot!
(54) Don't listen to him - the man's a complete idiot.sentencedict .com
(55) I stood there like a gibbering idiot - I didn't know what I was saying.
(56) He's an absolute idiot!
(57) He's made a complete idiot of himself over this woman!
(58) It took me ages to get this right - I don't want some idiot to mess it up.
(59) There was some idiot at the back of the hall making snarky comments.
(60) He's a fucking idiot.
More similar words: idiotic, idiosyncrasy, idiosyncratic, riot, biotic, riotous, patriot, chariot, antibiotic, audio, macrobiotic, odious, studio, tedious, hiding, acidic, mediocre, studious, abiding, accordion, solidify, subsidize, validity, incommodious, mediocrity, compendious, morbidity, subsidized, placidity, quotidian.