work off

verb4

1. •
   To lose (weight) by doing physical work; to burn off the calories gained from eating something.

   • We need to get moving to work off these donuts.
2. •
   To end (a debt) by doing labor for the person owed money.

   • After thirteen years, I've worked off my student debt.
3. •
   (informal) To ferment.
4. •
   (no longer used) To produce (printed matter etc.) by some process of work.

   • Pale Colour. When the sheets are worked off with too little ink. — 1774