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every 20th of the month is nug day. this requires a trip to the nearest McDonalds to purchase a 20 piece McNuggets.
John: Mike, we need to go to McDonalds
Mike: why?
John: because it's the 20th of the month.
Mike: it's nug day!!!
by batchfileface October 20, 2011
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any day when chicken nuggets are what everyone is eating.

Typically a Monday.
β€œYo, Maddi!! It’s nug day!!”
by chicken nuggets are dope May 28, 2018
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