shirtsleeves

noun[plural only]3

1. •
   Street clothes, without a jacket or special protection.

   • Even though there were dangerous chemicals about, they worked in their shirtsleeves rather than hazmat suits.
2. •
   Alternative form of shirt sleeves.
3. •
   Non-professional status

   • Then the retiree goes back to a real shirtsleeves again if he lives long enough. — 2006