To carry on drinking alcohol after vomiting due to excessive boozing
Barry did a great job of backing up after his last vomit
by Rahoolduke August 20, 2007
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More comfortable way to say tampons or maxi pads in public.
"Hey, can you check aisle 2 for tampons back up for me?"
by Elliegold April 16, 2014
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A phrase used when a small to medium sized girl with blonde hair and a heart shaped booty " pops locks and drops it" infront of you in a very flirtacious manor by "dipping it low" and pushing her ass into you on the way up, in hopes of getting your attention.
Guy 1: " Dude i was just here minding my own buisness and suddenly she came out of no where and tried to "back up on it" against my leg!

Guy 2: " All she wanted was for you to say something about her ass, she feeds on attention."

Guy 1: "Well i tried yelling "Back off Bitch", but it didn't seem to work, i will just be ready for next time."
by AvengerMan September 30, 2009
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That teacher, he be backed-up.
by Strongboy July 13, 2008
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Haplessly taken for granted just because it’s not “exciting enough” or it’s “too good”. A plan that will only be referred to when all else fails. When you become a back up plan you should
figure out a way to hit them hard with the realization that you won’t always be there for them to walk all over you when they have no one else to go to; that you’ve got your own plans too. Otherwise, you my friend, will forever remain stuck in that phase.
Checkout doormat
Person #1 : Hey bro so what’s our plans tonight?
Person #2 : Who said “we” had plans? Check back with me in an hour or two.
Person #1 : What, so now I’m a back up plan?
by lufituaed.bnim November 27, 2017
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