Before the act of intercourse you either glue a midget or a smaller person to your back, afterwards you being the intercourse while in the mid action you turn around so the smaller person can join in as well.
Guy1: Dude Jessie let me go Back to Back with her man!!!
Guy2: Oh man that sounds hecka cool!
Guy1: Lucky Joe was there to help.
Guy2: Oh man that sounds hecka cool!
Guy1: Lucky Joe was there to help.
by EathanTheDaggerDick October 31, 2017

Depending on where you are in the Eiffel tower, you are either the front cop or the back cop. The front cop is responsible for the mouth, nose, and ears. The back cop is responsible for the anus, vagina, and other orifices.
Michael: Hey P-Ka$h, do you think you'd be down for some good old Front Cop, Back Cop action downtown tonight?
P-Ka$h: That's really sus Michael, but if I get to be the back cop, you got a deal!
Michael: Nice P-Ka$h! Love having a good time with you!
P-Ka$h: That's really sus Michael, but if I get to be the back cop, you got a deal!
Michael: Nice P-Ka$h! Love having a good time with you!
by IloveChristina1234 March 20, 2022

The most advance and effective form of ball-tapping.
A move executed from behind, it involves grabbing the balls from between someone's legs, and pulling them "Down, back and then up." The victim should fall forward due to the nature of the attack.
Being a sneak attack, It is extremely effective and easier to pull off than the common ball-tap.
Variations include just a simple "Back and up" move, exactly the same but without the first Down pull. The victim should be lifted into the air before falling forward; this is very humiliating.
A move executed from behind, it involves grabbing the balls from between someone's legs, and pulling them "Down, back and then up." The victim should fall forward due to the nature of the attack.
Being a sneak attack, It is extremely effective and easier to pull off than the common ball-tap.
Variations include just a simple "Back and up" move, exactly the same but without the first Down pull. The victim should be lifted into the air before falling forward; this is very humiliating.
Lyman: So I was standing there minding my own business, when that jerk Matt came behind and Down-Back-Up'd me.
Ryan: Ouch man, slap dat ho
Maybe one day we can all go down-back-upping in the woods!
Ryan: Ouch man, slap dat ho
Maybe one day we can all go down-back-upping in the woods!
by GoatNoises September 20, 2009

A Twitter user who has a very low IQ and begs for follow backs. We call people who display similar behavior (Matt)
Person A: “Hey, this math problem is very hard”
Person B: “Jesus man, you’re such a Matthew follow back (Matt).”
Person B: “Jesus man, you’re such a Matthew follow back (Matt).”
by BisexualGentile June 27, 2021

When you’re banging a chick outside at night , you got her doggy-style. You can a firefly as it flies by, and stick it in her butthole.
As in, “I gave her the ole Albuquerque Back-up Light last night in Anderson’s hay field, it was awesome watching the glow on her perfect apple bottomed ass!”
by Swyre 3 April 29, 2024

No, they clearly want me to murder children, therefore, give em what they want. If I don't get what I want you are going to get what you want.
by Hym Iam May 22, 2025
