when you eat a lot of carbohydrates before going out to a party to get drunk. so as to have the carbs absorb some of the toxins and reduce the chance of puking.
Guy 1: hey man, you ready to go to bryans party and get drunk as shit? he's got three kegs.

Guy 2: oh you know i am! just lemme carb up really quick, i don't want to look like you last time, and puke all over lindsey.
by figger naggot1 August 26, 2008
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A phrase that is common among the vocal vegan population. It is meant as the solution to literally EVERYTHING especially when you are starving like hell and are forced to eat and entire bag of raw potatoes to survive.
Trying to go vegan guy: OMG I feel like absolute shit! No energy to do anything. I can't move. Help me Rebecca!
Rebecca (the vegan): Time to carb up! *Drops a plate full of potatoes on him*
by TheWhiteBowser August 16, 2016
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Eating mass amounts of carbs in one sitting.
Really you're going to eat all those fries...carb it up!
by Carabear77 February 22, 2015
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