(Ireland, slang) A job or income which is in addition to one's normal employment, generally done in the evening or on weekends; ''originally, work for payment that was not declared for taxation, now any work that is not part of one's regular job''.
2000, Patricia Scanlan, City Lives, Random House (Bantam Books), [https://books.google.com.au/books?id=R8-XSeey68QC&pg=PA385&dq=%22nixer%22%7C%22nixers%22&hl=en&newbks=1&newbks_redir=0&sa=X&ved=2ahUKEwidovu7_vqIAxW5zDgGHQfKD1IQ6AF6BAhVEA…
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Regional slang from around the English-speaking world — British, Australian, Irish, Caribbean, Nigerian, Filipino, AAVE, and the hyphenated-English dialects that make the internet sound local.
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