Full-back 

A term used to describe any type of Women's underwear that fully cover the butt.

Synonym "granny panties"

I can always tell it's time to do laundry when all I have left to wear are my full-backs

Full-back by Coolcandy September 11, 2014

Full Back 

Seth

Person 1: Seth you are full back
Seth: NOOOOOOOOOO I'MMMMMMMMMMMMMMMM NNNNNNNNNOOOOOOOOOOOOOOOOTTTTTTTTTTTTTT

Full Back by Yourmum@mybed8:00 June 18, 2019

full send back 

Strategically dropping a like on someone's old photo recently after they add you on another social media

"Bro the other day she added me on snap, I think I'm gonna try the full send back."

full send back by CoFlo35 December 19, 2017

Full Chest no back 

When someone says something so confidently that they use the capacity of their chest without reaching into back territory.

“They posted that pic with full chest no back”

Full Chest no back by BlowMyMindEverytimexxx March 9, 2020

Full ass sticky back

When you put your balls up someone's ass but leave your dick out so you can jack off on their back.

:oh man Why's your shirt all wet?
:Someone stuck their balls up my ass but left their dick out so they could jack off on my back.
:That sucks, you got a full ass sticky back

Full ass sticky back by GonzoPunch February 9, 2009

back pocket full of corn

When someone’s deadass or serious.

“That food was so good man.”
“Really?”
“Back pocket full of corn”

back pocket full of corn by jennoah October 24, 2022

full-backal 

The opposite of full frontal, when someone is seen completely nude from the back.

"Gail's never gone the full Walkabout."
"True, true. Gail's only gone as far as full-backal."

full-backal by Jeff Murdock January 1, 2010