Knock Down Meaning
(transitive, usually passive) To disassemble for shipment.
Example: As I took the can off the shelf, I knocked down the one beside it.
We knocked down the garden shed when we moved.
The picture was knocked down for Â£50.
They knocked it down by another Â£5, so we bought it.
To drink fast
I love to go down the pub and knock down pints of lager.
The furniture is shipped knocked down, so assembly is required.