Definition of berko in English:

berko

adjective

NZ, Australian
informal
  • Out of control with anger or excitement; berserk.

    ‘some motorists go berko when stuck behind a pootling cyclist’
    • ‘The public could go berko over the $36 million taxpayer contribution to the team's America's Cup campaign.’
    • ‘You are asked to give plot synopses for the big six classical ballets, and I went a bit berko here and managed to write 32 pages.’
    • ‘We predict they will win their semi-final play-off game, and the Mad Butcher will go berko and drop dead of a heart attack.’
    • ‘They had an old granny with them, and she went berko—how dare we walk past them, and why didn't we exit off the balcony?’
    • ‘He went berko with a $200 million plan designed to plug the gaps.’
    • ‘You thought the Left went berko last year, what with all that liberating, capturing, and cooperation?’
    • ‘I had to move to a less demanding role because my lower back had a bad habit of going berko about 10 days into a two-week exercise.’
    • ‘I understand their going berko when trapped behind some hemp-clad feral weaving from side to side and balancing shopping bags of soy milk on his handlebars.’
    • ‘Go berko with the machete for seven minutes, or until exhausted.’
    • ‘I wish I had written that trash-mag headline I saw: 'Brit's bald berko brolly bash!'’

Origin

1960s: an alteration of berserk + -o.

Pronunciation

berko

/ˈbəːkəʊ/