knock off

:  to stop doing something

1 :  to do hurriedly or routinely knocked off one painting after another

2 :  discontinue, stop knocked off work at five

3 :  deduct knocked off a little to make the price more attractive

4a :  kill knocked off two men … on mercenary grounds — Lewis Bakerb :  overcome, defeat knocked off each center of rebellion

5 :  rob knocked off a couple of banks

6 :  to make a knockoff of :  copy, imitate knocks off popular dress designs