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 27, 2007

by Mark Walker October 22, 2007

Similar to saying "pound it" usually involves hitting of two or more clenched fists together in an expression of triumph.
by TheRealJohnO December 14, 2004

To masturbate
Going job hunting today?
Nah, got a fifth of vodka, gonna watch yoga, and maybe knock the rocks a bit.
Nah, got a fifth of vodka, gonna watch yoga, and maybe knock the rocks a bit.
by Ziplin January 27, 2010

A popular mischievous prank in which two or more individuals approach a house door and attach a fishing line to the top of the door with duct tape, with a rock attached with duct tape about a foot or so lower, then "knock" the victim's door by utilizing a "pulling" action from across the street, or otherwise in hiding.
by Bailey Hackbarth January 13, 2008

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.
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
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

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.
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.
by Genesis and Phil Collins May 19, 2010
