Similar to saying "pound it" usually involves hitting of two or more clenched fists together in an expression of triumph.
Joms: YEA MAN! I JUST GOT ME A MONSTER!
HOMS: KNOCK THE ROCK!!!!!

*the rock is then knocked*
by TheRealJohnO December 14, 2004
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Going job hunting today?
Nah, got a fifth of vodka, gonna watch yoga, and maybe knock the rocks a bit.
by Ziplin January 28, 2010
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Knock n' Rock in the game were you knock on a random person's door then punch whoever opens it.

You probably here off reddit.
Guy 1: What happened to you?
Guy 2: Got wasted last night and played Knock n' Rock.

Guy 1: Who's house did you go to?

Guy 2: Jeremy's
Guy 1: Who's Jeremy?

Guy 2: He's the one always wearing the biker helmet.
Guy 1: So he hit you and broke your nose?
Guy 2: Nah I tried to run after I hit him and fell down his steps
by GannoFuyu April 22, 2021
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That goofy fist-to-fist contact that guys do instead of shaking hands. Often seen done by the 909 'bro crowd.
Bob put his hand out to shake, but Chris put his fist out thinking that Bob intended to knock rocks.
by Gloria Butterworth May 12, 2007
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As popularized by the "Worst Wedding DJ Ever! (Original)" video found on youtube, this move of unparalleled gumption and rhythm requires walking up to your significant other and essentially playing the congos with their boobies.

The move can only be employed at weddings while listening to Phil Collins', "In the Air Tonight," thus making it extremely rare to be seen.
"Honey, did you just see the perfectly executed Knock Knock Boobie Rock?"
by Genesis and Phil Collins May 19, 2010
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Hard Knock Rock is a Luke Slater track from the album 'Wireless'
Hard Knock Rock is a fucken winner when it drops...
by Mark Walker October 6, 2007
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A self congratulatory motion involving bumping one's own fists together in a "fist bump," reserved for moments of complete awesomeness.

Akin to phrases such as "toot your own horn" and "pat yourself on the back" that can convey exuberant celebration of a specific accomplishment and / or pride in a small, personal feat.
Person 2: That's tite,man! Did you celebrate with a fist bump or a jump-hip bump?

Person 1: No one would touch me after the event, so I had to knock my own rock.

Example:

Person 1: YESSSSS!! I BEAT DONKEY KONG AT 4 AM LAST NIGHT!

Person 2: Did you knock your own rock?

Person 1: Like a quarry worker!
by Clanate July 21, 2013
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