twenty-one backtick 

Twenty-one backtick is how you say the text " 21` " which is typed by hitting the three top-left keys from right to left on a standard English Keyboard: 2, 1, and backtick
Used in IM to mean over and out.

Guy 1: OK, I'll see you in like 5 minutes
Guy 2: k, 21` twenty-one backtick

twenty-one backtick by Nizzity July 30, 2007

Backtivity 

back·ti·vi·ty \bak-'ti-vi-tē\ n, pl -ties (2011) 1: The quality or state of being sexually active/experimental with a view from the rear. 2: Vigorous or energetic action from the rear. 3: A similar process actually or potentially involving sexual function from behind. 4: An educational procedure designed to stimulate sexually (specific: Anal, Doggy, Reverse Cowgirl, blowing your load on her ass/back).

Timmy: Last night, Tiffy and I got into some crazy new stuff we'd never done before. One was like the piledriver only she was staring right up at my nuts and asshole.

Mikey: Yeah? Sounds awesome. Good thing you made those bunk beds. Now you have so much more room for backtivities.

~

Tiffy: Timmy and I tried a whole new backtivity last night where all I could see was his sack and butthole bramble patch.

Daisy: Was it any good?

Tiffy: It was definitely better than looking at his ugly schmuck mug.

Backtivity by tandem double frogman April 26, 2011

backtitties 

this occurs when a woman is so fat she has titty like fat deposits on her back

"Did you see may?"
"Ya, she has backtitties going on."
"Gross."

backtitties by Thefartmasster69xxx#promlgswag November 9, 2012

backtishus 

"Back-tish-us" A tissue for the back.

Person 1: I need to wipe my back!
Person 2: Use a backtishus.

backtishus by One True Fertile Fart March 24, 2022

Itchy Backitis 

The sudden onset of an itch on ones back. May be random or caused by an action. The only known cure is immediate scratching by one's significant other.

I was enjoying a TV show when I was confronted by suddenly having itchy backitis.

Itchy Backitis by Dr. Vanostron May 15, 2014

backticks 

Known as ` It's by the 1 key.

I own you man! ````````

backticks by Unleashed2k September 9, 2004

Blacktitus 

Blacktitus: Someone who thinks they are black and acts gangster.

He has a severe case of Blacktitus

Blacktitus by Shakespeare III September 6, 2011