Top Definition
1. To deny an opinionated truth or a well established fact.
"Don't knock it till you try it"

"Fuck anybody who knocks it"
by DaLeerium January 09, 2012
3 more definitions
to have hardcore sex
I need to go to the crib and knock it with that hoe Karen
by nevasboy February 28, 2004
knockits are a combination of the words knockers and tits shouted whilst highly aroused.
by cannock granty January 19, 2010
Meseyside Slang For Vomiting, also known as "taking the knock"

can be used as an adjective or a noun
"arr lad, i drank too much, am gunna knock it"

"phil woke up to find his shoes where covered in knock it"
by Mr Brap July 04, 2009

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