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The act of drinking Champagne on Thursdays as well as Fridays, and continuing to repeat the pattern and making it a weekly tradition.
"Good news, it's Champagne Thursday"
"But it's Friday"
"Uh, Yeah, I know. Thursday came twice this week."
"For the third straight week?"
"There's talk of making it permanent."

"Oh, kind of like Daylight Saving's Time?"

"Right, but for booze."
by Sweet Lou Nasty February 16, 2012