To ask someone to repeat something which needs clarification.
Jerry: She said there's some tractor story that she hasn't told me about.

George: Woah, back it up, back it up, Beep! Beep! Beep! Tractor story?

Jerry: Beep, beep, beep? What are you doing?
by Dick Armey October 20, 2006
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"Backing that thang up" is a term used to define when one simply backs up their massive load of tooshie. (Example: "I like the way you dance girl, back that thang up!")
Twerking ass shaking backing it up shuffling reverse shake dat backing that thang up
by twerkteamcaptain September 21, 2013
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The way disney Tell you to back the f up well sounding original.
MAN- GIVE ME ALL YOUR MONEY!!!!
MEEP- Bippity Boppity back tf up out of my swamp you Sea witch looking man!
by EATSH!T January 20, 2018
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sumthing u say to a douche who is talkin shit and cant back it up, a.k.a 7-2
gay wanna back that up with a fist ill stab u wench ahhh im sorry
by Anonymous May 22, 2003
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You've had a massive night out on the piss and you're gonna do it all again tonight.
I know you got bat faced last night mate, but are you gonna back the truck up tonight?
by TommyTeaCosy July 30, 2009
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A phrase said prior to any ridiculous statement to give the illusion of validity.
"Now, I don't have the facts to back this up, but I believe Herman Cain was born in Indonesia."
by Notwhoyouthinkitis October 7, 2011
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