knock off

verb10

1. •
   To remove (something or someone) by applying a strong force.

   • He was knocked off his bike.
   • The wave knocked me off my feet.
2. •
   (slang) To halt one's work or other activity.

   • I think I'll knock off for the evening and go to bed.
3. •
   To make a copy of, as of a design.

   • They send people to the shows in Milan for "ideas", which means knocking off the designs they guess would sell.
4. •
   (slang) To kill.

   • The mobsters hired the guy to knock off their enemies.
5. •
   (slang) To defeat.

   • The Hammers knocked off Arsenal on the strength of a 78th-minute tally from Jarrod Bowen.
6. •
   To remove, as a discount or estimate.

   • They agreed to knock off 20% of the price.
7. •
   (slang) To rob.

   • They decided to knock off a liquor store downtown.
8. •
   (informal) To accomplish hastily.

   • I knocked off a couple of quick sketches before the design meeting.
9. •
   (slang, vulgar) To have sex with (a woman).

   • I took her down to Basin Street and to a movie, then took her to my room and knocked her off. — 1965
10. •
    To assign (an item) to a bidder at an auction, indicated by knocking on the counter.