knock off
Meaning: to murder somebody
For example:
- knock sb off Did you hear about the insurance salesman who took out policies on his customers and then knocked them off in order to collect the payouts?
- knock off sb Tony reckons a mafia hitman will knock off anyone who talks to the police.
- be/get knocked off by sb The police said the girl was probably knocked off by the guy she was with when she left the bar.