Muffin Bumping 

The act of two lesbians smashing their vaginas together in order to recieve sexual gratification.

Hey Nicole you down for some muffin bumping?

Sure, I'll bring my Melissa Ethridge CD!

Muffin Bumping by edenri July 2, 2016

bumping nasties 

Sex, as in thrusting two hairy, smelly parts of the body into each other till gooey liquids spurt out.

We were bumping nasties all night man, she was looser than my ass after an all you can eat mexican buffet!

bumping nasties by Anonymous May 28, 2003

bumping stinkies 

The act of having sex with foul smelling reproductive organs.

After a hard workout, both Mary and John were bumping stinkies despite not having taken a shower first.

bumping stinkies by PaulJohnson October 3, 2008

Shadow Bumping 

When on an online car game your player is at a delay causing your car to hit other players when you didn't hit them or you hit a car that isn't there anymore.

Man, this game has so much shadow bumping. I keep hitting players!

Shadow Bumping by Hayase June 21, 2021

bumping rails

Snorting lines of cocaine.

"She was in here every night bumping rails, that girl had a coke habit!"

bumping rails by cosmic42 June 30, 2017

bumping slugs

Lesbian sex, specifically scissoring

We caught Tracie and Erika bumping slugs at the party last night.

bumping slugs by LiquidNightmare January 24, 2012

Bumping Shields 

The awkward moment when you're double teaming a girl and the guys balls bump into each other.

Two guys nuts touched each other while double teaming a girl but they weren't quite sure if it was bumping shields.

Bumping Shields by Mayur February 3, 2013