Balloon Butting 

Balloon Butting is when you stick a balloon into your anus and then have a friend inflate it to induce sexual pleasure, or you self inflate using a series of tubes/straws.

Hey did you hear that Paul was Balloon Butting?
Ya! It totally burst inside of him and he pooped out plastic!

Balloon Butting by RickyPJangles May 18, 2014

Nut Butting

When a man and another man ride a motorcycle together. Named that because the one mans nuts touch the other mans butt.

Paul: Hey Aaron, wanna take a ride on my new bike?

Aaron: Maaaannn, I don't want to go Nut Butting with you.

Nut Butting by Aaron East August 19, 2012

Head-butting 

When you have sex with a pregnant female. The term comes from the fictitious contact between the head of the erect penis and that of the infant.

"How was your night with prego Sally last night?"

"Let's just say we did some serious head-butting!"

"Niceeeeee"

Head-butting by ForeverBethBredl February 15, 2010

butting

to go infront of someone without asking while in a line

hey stop butting me!
he butt infront of me in line.

butting by Hila-cool July 9, 2007

Butting Heads 

Having a conflict with someone else.

I keep butting heads with my business partner because he doesn't think we should paint the conference room and I do.

Butting Heads by Dustin Clinton October 9, 2008

Buttfingers

someone who scratches their ass and then their fingers smell like shit

my husband has buttfingers after he scratches his ass

Buttfingers by yourcrazy April 25, 2006

motor butting

the act of motor boating but using a woman's ass cheeks in place of a woman's breasts

Bob really is an ass guy, so he decided on motor butting Nancy

motor butting by phildothegreat October 18, 2013