Buttyback 

Chick with no ass. Her back runs straight into where her ass cheeks should be

Look at that flat ass chick. She's got buttyback

Buttyback by BrooklynJohnnyBlaze June 15, 2015

Buttack 

To stick ones finger ,usually in the form of a sneak attack, in someone's ass crack when it is exposed above their pant/underwear line. While doing so scream "Buttack!!!"

As Emmett leaned over exposing his plumbers crack Jason exclaimed "Buttack!!" While sliding his pointer down his toosh.

Buttack by Toiletstains March 30, 2015

buttracker

A person who tracks or looks at butts they find attractive. May also be used as an insult.

Friend 1: Stop looking at those butts, you buttracker

buttracker by minhothesassking April 16, 2015

Buttpacker 

A play on words, connecting the words "backpacker" and "butt". Somebody enthusiastic about travel with a pinch of naughty to them.

Mainly a noun but can be used as an adjective.

- "Omg, that girl totally just flashed her tits from the top of the Eiffel Tower !"
- "Totally buttpacker"

- " We saw this funny penis shaped pile of rocks on our trip to Himalayas"
- " Must have been somebody from the buttpacker crew"

Buttpacker by Buttpacker June 20, 2018

buttcrack coolidge 

Noun - a person who exposes their buttcrack in public, likes to steal stuff off porches to support their crack and meth habits, a does it in a cool climate during the cold months.

Verb - The talented act of inserting crystal meth into your buttcrack to make it cold.

Noun - That hater Carol was such a buttcrack Coolidge for stealing my Christmas decorations.

Verb - Give that ice a buttcrack Coolidge so the haters can get a fresh tasting jail burrito.

buttcrack coolidge by Grand Firctionary March 30, 2017

Buttcrack of dawn

Very very early in the morning, right before the crack of dawn.

God I'm tired, that damned dog woke me up at the buttcrack of dawn

Buttcrack of dawn by Blake November 11, 2002

buttcracker 

fucking good sex, that cracks your butt, but not psychically

my boi, tyrell, he a buttcracker

buttcracker by baybee gurl May 29, 2004