Definition of loony in English:

loony

noun

informal
  • A mad or silly person.

    ‘she was working with a bunch of loonies’
    • ‘I felt like a loony, what the hell was I playing at?’
    • ‘If anyone else had have been sitting there, they would have thought I was a loony.’
    • ‘‘I suppose I've moved from being an extremist to a tolerated loony,’ he laughs.’
    • ‘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.’
    • ‘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.’
    • ‘Suddenly, I felt like the mad loony in the corner that everyone cautiously avoids.’
    • ‘I think it would help if I met someone who didn't think that Wolfram is a loony.’
    • ‘He started directing it up to my ear, and I was convinced I was sitting next to a bona fide loony.’
    • ‘The pit boss will then happily conclude that he has a loony on his hands.’
    • ‘People often say, ‘Why does the loony on the bus/train always sit next to me?’’
    • ‘So I sat with my books unread and listened to the loony for an hour or so.’
    • ‘He has been called a loony, naive, gullible and a traitor.’
    • ‘Boys, I think you're mistaken about who the loony is around here!’
    • ‘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.’
    • ‘If you'd ask her, she would say the man was a loony.’
    • ‘Are the media stereotyping her as a left-wing loony?’
    • ‘The odd person might wonder about it, but like I said, only a loony would do it.’
    • ‘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.’
    • ‘Brian started waltzing around the living room, bopping his head and waving his arms like a complete loony - which he in fact, was.’
    eccentric, oddity, odd fellow, unorthodox person, individualist, nonconformist, free spirit, bohemian, maverick, deviant, pervert, misfit, hippy, dropout
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adjective

informal
  • Mad or silly.

    ‘loony drivers’
    • ‘With that in mind, I'd like to take this opportunity to salute my three favorite loony rockers of all time.’
    • ‘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.’
    • ‘I haven't deleted it, simply because it's far more amusing that most loony entries.’
    • ‘He said his staff hadn't passed on the message as they thought it was ‘from some loony e-mailer’.’
    • ‘He needed to get away from that crazy loony school.’
    • ‘This is the Cornwall of myth, a clichéd caricature version of the county complete with exaggerated eccentrics, loony local lore and mystical happenings.’
    • ‘He was a unique investigator, however loony you might have found his results.’
    • ‘How long does it normally take for a person to go a bit loony out there?’
    • ‘State your argument, then point to a loony fringe of society who may not even exist to prove it!’
    • ‘Now you might say that some of their policies are a bit loony.’
    • ‘‘Councils do attract loony councillors,’ he explained.’
    • ‘That's the bonus with having depressed and/or raving loony parents.’
    • ‘And the film boasts a very funny, intentionally loony last-minute plot twist.’
    • ‘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.’
    • ‘They must get a lot of loony email from kids and psycho fans.’
    • ‘The capacity of our Council for loony decisions defies the imagination.’
    • ‘That to me is so loony I don't feel it's even worth the time to argue.’
    • ‘At 70 years old, she's had decades to build up a record for saying loony things and she has succeeded admirably.’
    • ‘I went through the motions but thought that the pastor was a bit loony!’
    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

/ˈluːni/