Top Definition
Beer, preferably natty light, that has sat in an uncovered pitcher or water jug for over 12 hours.
"I feel like this natty light lacks the delicious carbonation that I've grown accustomed to from this great beer."
"That's because it's flatty light!"
#beer #fratty light #natty #light #frat #carbonation #pisswater #natural light #busch #keystone
by Rundeezy September 30, 2011
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