Wiktionary
work off
vb. 1 (context transitive English) To lose (weight) by doing physical work. 2 (context transitive English) To end a debt by doing labor for the debt holder
WordNet
work off
v. cause to go away through effort or work; "work off the extra pounds you have gained over the holidays"; "we must work off the debt"
Usage examples of "work off".
Especially with an incredible extension of debt which you must work off.
It may be necessary to give them the odd mission to work off some of their .
The youth rubbed his palms together to work off nervousness without clenching them again.
In this place the Seine is very rapid, so that he had some difficulty to work off from the point of the island.