Back Gash 

- Generally a term used to describe one's anus (a.k.a arse hole)

- Comes from the word gash - which is a slang word for a vagina

- Back Gash is a term is often used by gay men.

Gay 1: How was last nighe?
Gay 2: Good, but my back gash is really sore! He was HUGE!

'I shouldn't have had that indian food last night, my back gash is killing me'

Back Gash by Liam D - Official Welsh Scene Personality April 20, 2008

gash back 

something or (someone) that is so completely and utterly gash, they qualify for gash back. in short, gash of epic proportions. or just generally a term for skanks, who spend the majority of their time on their backs.

you're more than a slut, you're a walking gash back.

OR

stop talking shit, i didn't ask for gash back.

gash back by XxDxX July 31, 2007

Gash-back

A flash back of some memorable gash a.k.a vagina. Was first coined at 4:25am on the 5th of december 2011.

e.g. I'm having a gash-back

simular useage to flash back but only refers to gash.

Gash-back by Kai-pachi December 6, 2011

backgash 

That sweet, sweet pussy - but from the back. Refers to a female's vagina viewed from her posterior.

"Jack couldn't make it to the show on time because he was busy dealing with the backgash"

backgash by 0thugnificent0 May 9, 2023