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 4, 2008
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
by Mark Walker October 6, 2007