Definition of nixer in English:

nixer

noun

Irish
informal
  • An extra or irregular job, the income from which is not declared for taxation purposes.

    ‘an RTE engineer doing a nixer installed the aerials’
    • ‘The company's general manager told the tribunal that she had become concerned that members of staff were doing nixers while on company time.’
    • ‘Many of the anaesthetists are also junior doctors doing the work as a nixer.’
    • ‘I knew the extra money he made doing odd nixers didn't come into our house.’
    • ‘Despite doing well at the phone company, she is making even more cash from her nixer.’
    • ‘We do nixers, claiming social welfare benefits we're not entitled to.’

Origin

From nix + -er.

Pronunciation

nixer

/ˈnɪksə/