knock off phrasal verb informal ( see also ↑ knock )
1 . STOP WORK knock off (something) to stop working and go somewhere else:
There was no one in the office because they’d all knocked off for lunch.
Do you want to knock off early today?
We usually knock off work at about twelve on Saturday.
2 . REDUCE A PRICE knock something ↔ off to reduce the price of something by a particular amount:
I’ll knock off £10.
knock something off something
Travel agents are knocking £50, and sometimes £100, off the price of holidays.
3 . REDUCE AMOUNT knock something ↔ off to reduce a total by a particular amount
knock something off something
Moving house will knock an hour off Ray’s journey to work.
4 . PRODUCE knock something ↔ off to produce something quickly and easily:
Roland makes a lot of money knocking off copies of famous paintings.
5 . MURDER knock somebody ↔ off to murder someone
6 . STEAL knock something ↔ off British English to steal something