When a person accidentally puts their foot in their mouth or otherwise insults someone, or makes everyone aware of an elephant in the room. Then he or she tries overly hard to make the situation better, or cover up their tracks. Like heavy machinery moving backwards, it's definitely noticable.....
"Wow, you really pissed off Cassidy, do you always Beep when you back up?"
by Dumbella July 2, 2009
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An extra person that you keep in your back pocket on a sense
"I won't be used as a back up card if you break up"
by Awesome cat guy March 29, 2016
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A person that is a "friend" but is treated very poorly, and is only used as a second option incase their #1 friend isnt around.

back-up friends may be ignored, and not invited to things.
a back-up person are in a trio relationship of any kind

they may be that friend that walks behind the group when they are talking about something they didnt go to, and the friend that gets left on read in the groupchat and gets called annoying.
"I feel like a back-up friend when im around her." -1
"im sorry for you" -2
by Da.weirdo July 5, 2022
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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.
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!
by GoatNoises September 20, 2009
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a second tissue used to pick up an original tissue used by yourself, or someone else
Person 1-hey, get that tissue over there
Person 2-eww, its been used
1-use a back-up tissue
2-whatever, *mumbles*..floppy in the joppy
by SuperJap3 October 6, 2009
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Backed up is when u haven't had pussy in so long
Bro I'm backed up, I haven't had pussy in months
by Varrrr August 21, 2023
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