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Something that occurs when combustion of some of the air/fuel mixture in the cylinder does not result from propagation of the flame front ignited by the spark plug, but one or more pockets of air/fuel mixture explode outside the envelope of the normal combustion front.
Modern cars are prone to low-speed knocking
by Sir. B October 24, 2020
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Nov 27 Word of the Day
A stupid person; it refers to the lack of surface area on an individual's brain. The general thought is that the more surface area (wrinkles, creases, etc.) a brain has, the smarter the person is. Conversely, a person with a smooth brain (no wrinkles) has less surface area and would therefore be stupid.
That fucking smooth brain put his shirt on backwards again...

That smooth brain is dumber than a pile of shit.
by Tip Tank May 14, 2011
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2
Something your family can’t do before they enter your room
*mother barges in bedroom whilst you’re in the middle of having sex*
You:”Holy shit mum, every heard of knocking”
by elv14 October 27, 2020
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3
I aint knocking your lexus but my caddy will smoke ya..

or

your shoes are gay, i aint knocking ya you know what im saying, but the ladies ain't gonna come holla with them thangs..
by Brian September 13, 2004
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5
Sending someone a video request thru Knocking Live Video on your mobile phone.
I'm Knocking on your phone! Please answer!
by The World Is Knocking May 13, 2010
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