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Drinking excessively, especially during the week, and staying out until last call. Usually needs to happen more than one consecutive night in order to really count as Flintering, but getting completely blitzed can still qualify. Originates in Ireland.
"Darrach, why do you look so tired? You have a big proposal today!" "Man, I've been Flintering all week. I'm WRECKED!"
by terminator98 April 16, 2013
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