Bumper butt 

It's a butt that is is very big and attractive were you wanna hit it. Like in bumper cars you wanna hit the other people.

My boyfriend has a bumper butt

Bumper butt by Gpnfa July 10, 2014

Butt Bumper 

A Butt Bumper is a guy that screws around. He is a bumper of butts, Also used to describe a gay guy. Like hey look at the Butt Bumper over there talking to his boy friend, Butt Bumper. Also meaning a person that procrastinates Example hey dude you need to hire someone else this dude is a serious Butt Bumper. Also A Butt Head

Butt Bumper,

Butt Bumper by Daman Money January 25, 2010

Bumper Butts 

A game played while on the bus whereby two (or more) people repeatedly touch butts (tap ass, moon landing, etc).

"Wow that was an exhilterating game of bumper butts! I feel like I owe you a drink!"

Bumper Butts by gjcourt November 9, 2012

Bummer Butt 

People on the beach who when you see from behind can ruin your day because there swimsuits and butts are the wrong size for each other.

I was having a good time relaxing at the beach until I saw a bummer butt and had to go home.

Bummer Butt by Bullshitzer June 11, 2010

Biffy Clyro Buttfuck Bumper Pack 

The complete discography of Biffy Clyro, including previously unreleased material, comes with some hefty condoms so you can be buttfucked or buttfuck someone whilst the albums play in the background, help me captain of, your crippled asshole.

Hey Dan, I've just bought the Biffy Clyro Buttfuck Bumper Pack, so you better bend over and prepare to have your hole wrecked.

Biffy Clyro Buttfuck Bumper Pack by AnonymousTrevor November 20, 2018

Bummerbutt 

when something is a sucky ass situation OR a retarded butt of a person

Boy: I have to go to work at 4:30 A.M. tomorrow
Girl: Wow. That's a bummerbutt!

OR

Awesome person to loser: Stop being such a bummerbutt!!

Bummerbutt by AwesomeJandM July 1, 2011

bummer in the butthole

V1. When something wrong or unfortunate happens.

V2. An anal experience gone wrong.

V1. “I spilled my beer all over myself. It was a real bummer in the butthole.”

V2. “That guy from my tinder date was a real bummer in the butthole last night.”

bummer in the butthole by Lil’ dickie February 2, 2018