Definition of loony in English:

loony

noun

informal
  • A crazy or silly person.

    ‘she was working with a bunch of loonies’
    • ‘Brian started waltzing around the living room, bopping his head and waving his arms like a complete loony - which he in fact, was.’
    • ‘I think it would help if I met someone who didn't think that Wolfram is a loony.’
    • ‘So I sat with my books unread and listened to the loony for an hour or so.’
    • ‘Suddenly, I felt like the mad loony in the corner that everyone cautiously avoids.’
    • ‘Are the media stereotyping her as a left-wing loony?’
    • ‘Boys, I think you're mistaken about who the loony is around here!’
    • ‘People often say, ‘Why does the loony on the bus/train always sit next to me?’’
    • ‘‘I suppose I've moved from being an extremist to a tolerated loony,’ he laughs.’
    • ‘I felt like a loony, what the hell was I playing at?’
    • ‘The odd person might wonder about it, but like I said, only a loony would do it.’
    • ‘I wanted to be close to you, but I was sure that if you knew about the visions, you'd think I was a loony.’
    • ‘The pit boss will then happily conclude that he has a loony on his hands.’
    • ‘If anyone else had have been sitting there, they would have thought I was a loony.’
    • ‘If you'd ask her, she would say the man was a loony.’
    • ‘He started directing it up to my ear, and I was convinced I was sitting next to a bona fide loony.’
    • ‘Both characters are very real and quite maddening; Sibel in particular is astonishingly selfish and bratty, proving what a fine line it is between a force of nature and a total loony.’
    • ‘Another standout track is Extreme Ways which alternates between sexy and sinister, all the while challenging you to sit still and not dance around the room like a loony.’
    • ‘However, Greta had somehow adopted the title of the town loony.’
    • ‘I think you began well but then you started referring to all the individuals of the BBC as ‘they’ which made you sound a bit like a loony.’
    • ‘He has been called a loony, naive, gullible and a traitor.’
    eccentric, oddity, odd fellow, unorthodox person, individualist, nonconformist, free spirit, bohemian, maverick, deviant, pervert, misfit, hippy, dropout
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adjective

informal
  • Crazy or silly.

    ‘loony drivers’
    • ‘‘Councils do attract loony councillors,’ he explained.’
    • ‘This is the Cornwall of myth, a clichéd caricature version of the county complete with exaggerated eccentrics, loony local lore and mystical happenings.’
    • ‘The capacity of our Council for loony decisions defies the imagination.’
    • ‘He said his staff hadn't passed on the message as they thought it was ‘from some loony e-mailer’.’
    • ‘They must get a lot of loony email from kids and psycho fans.’
    • ‘How long does it normally take for a person to go a bit loony out there?’
    • ‘He was a unique investigator, however loony you might have found his results.’
    • ‘At first blush, the winning idea can seem a bit loony, but as it comes into focus its transformative value gets clearer and clearer to more people.’
    • ‘That to me is so loony I don't feel it's even worth the time to argue.’
    • ‘I went through the motions but thought that the pastor was a bit loony!’
    • ‘Now you might say that some of their policies are a bit loony.’
    • ‘With that in mind, I'd like to take this opportunity to salute my three favorite loony rockers of all time.’
    • ‘At 70 years old, she's had decades to build up a record for saying loony things and she has succeeded admirably.’
    • ‘State your argument, then point to a loony fringe of society who may not even exist to prove it!’
    • ‘And the film boasts a very funny, intentionally loony last-minute plot twist.’
    • ‘That's the bonus with having depressed and/or raving loony parents.’
    • ‘He needed to get away from that crazy loony school.’
    • ‘But for every loony tune there are several solid symphonies, whose excellence few critics will decry.’
    • ‘I'm slightly worried about what's going to happen with the woman schoolteacher, who seems to be a bit loony.’
    • ‘I haven't deleted it, simply because it's far more amusing that most loony entries.’
    severely mentally ill, mentally ill, insane, mad, certifiable, deranged, demented, of unsound mind, out of one's mind, not in one's right mind, not together, crazed, maniac, maniacal, lunatic, unbalanced, unhinged, unstable, disturbed, distracted, stark mad, manic, frenzied, raving, distraught, frantic, hysterical, delirious, mad as a hatter, mad as a march hare
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Origin

Mid 19th century: abbreviation of lunatic.

Pronunciation

loony

/ˈluni//ˈlo͞onē/