The noise that Drinky Crow makes when he drinks XXX.
Since then, it has been generalized to mean any episode of drinking like Drinky Crow.
(Drinky Crow is in the Maakies comic written by Tony Millionaire.)
Sacheezus: I'm thirsty.
Moogie: Dook-dook at the alehouse?
Sacheezus: That's a great idea! DOOK-DOOK!!
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