Phrasal Verb: Knock back
Meaning: Cost someone a lot of money
Example: Your holiday must have KNOCKED you BACK a bit.
Meaning: Finish a drink quickly, drink a lot of alcohol
Example: The pub was closing so we KNOCKED our drinks BACK and left.
Example: It really KNOCKED me BACK when I heard they had been killed.
Other Phrasal Verbs
We have 10 phrasal verbs with 'KNOCK'