1. when having sex with your girlfriend on a couch and you fall off
2. when engineers at NASA drop the rocket when moving it on the couch platform
dood last night i accidently knocked the rocket off the couch.
A term used to describe a Freemason invented by a pirate.
That 3 knock steppa can't even walk the talk
Knocking can be used as a very versatile word. It could mean joking, failing, messing around, fucking, etc. Meaning is up to context of the conversation.
“you look like an idiot, why you knocking?”
“bitch, are you knocking that guy?”
“girl you have to be knocking right now”