A day where usually year 12s do things that are not allowed e.g tying a year 7 to a pole ect. mostly done in Australia.
Year 12 N1 : What are you doin for Muck Up day?
Year 12 N2 : I’m starting a water balloon fight on the oval
by eedeen November 11, 2021
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National day to buy some marijuana and smoke it with the person you brought it from.
"Aye bro I gotta go to Zigg house tomorrow he always come through."
"What's Tomorrow"
"You ain't hear? It's national fire the plug up day" July 13th.
by jiggyziggyniggy June 25, 2021
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National Scam children and blow up there house day is a day on october 1st where you get to legally scam kids and blow up there house with a 100000000000000000 gigabyte file
man: hey kid want free Robux

kid: yes!

*downloads 1000000 gigabyte file*

kid: wait why is my computer smoki

*BOOM*

man: happy National Scam children and blow up there house day
by trrrrrbfhgkje October 13, 2023
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