It's a type of kiss where you only bump your cheek into the other person's cheek instead of actually kissing the person on the cheek
John: It's nothing serious. They're just giving each other cheek bumps.
A knife bump is done using some form of a knife to retrieve a small single dose of cocaine to be snorted. Usually seen at festivals or large outdoor parties where straws and whatnot aren't readily available.
"Dude, see that guy over there? He's giving out knife bumps to everybody who wants them, go get it!"
male becomes erect enough that his penis is pressed against the zipper of his pants.
Yo Ming! you see those two asian school girls making out on the bus, got me straight up zipper bumping....ya digggggg?
The act of fornicating with a member of the opposite sex.
Tim: So did you and ben..you know...bump chickens?
Joe: Nah man, I'm not gay..
Liv: Oh my god. I want to bump chickens with him so bad!
A light friendly shoulder punch one usually does to a buddy after a sarcastic joke or a snide remark.
Chris: yoo dog what is you wearin? Lmao
Rob: my mom bought me this shirt dawg. Shut up. *buddy bump*
You go to a public restroom, have a bowel movement, and do a line of Cocaine.
I'm just heading to the bathroom for a dump bump
Another saying for traffic.
Sitting in traffic, all you see are fronts and bumpers of cars, shorten that and you have "fronts and bumps".
Can also be used to describe anything unsatisfactory.
"Sorry I was late, it was all fronts and bumps on 101."
"Man, this party is all fronts and bumps. Let's get out of here."