Daily Grind Meaning

(idiomatic) The difficult, routine, or monotonous tasks of daily work.

Example:   As soon as he has the money to retire, he plans to leave the daily grind and travel more.
2014, Ian Black, "Courts kept busy as Jordan works to crush support for Isis", The Guardian, 27 November 2014:
  â€œWhy bother with the daily grind when you can go to Mosul, get paid $400 a month, get a wife – and live an Islamic way,” went an exchange between two men overheard by a fellow passenger in a taxi. Rumour has it that a woman whose husband died fighting with Isis now receives a generous widow’s pension from jihadi coffers.