Buttback 

When Yo' butt get so big it start runnin' up yo' back.

Damn Kayla you gots that Buttback, yo butt so big it runnin' up yo back!

Buttback by eric estrada April 24, 2008

Buttback 

When you fuck up the lower part of your back, but it ain't the butt, but it feels like your ass and back have fused with pain.

"Bruh my buttback be hurting me"

Buttback by Crimsonfucker1782 August 2, 2024

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

vestigial buttsack 

When a person is born with the parts to form a butt (butt cheeks) but no flesh ever properly forms in it, so that the prson doesn't have the natural roundness of a butt and are therefore forced to sit on the extension of their thighs for lack of a natural butt. Or in simpler terms- lack of butt meat.

Hold on, is that Crystals's thighs or just her vestigial buttsack that's creeping from the top of her jeans when she bends over?

vestigial buttsack by Zoraya M May 19, 2008

peeing your buttsack 

When someone has taken a pee and it has overflowed the buttsack.

Hey man, quit peeing your buttsack!

peeing your buttsack by The real mike jones November 14, 2014