muck up day is usually when year 12s do a prank similar to senior pranks. mostly used and done in australian public schools
P1 : What are you doing for muck up day?
P2 : tying a year 7 to a pole.
by eedeen November 6, 2021
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National break up day is always the first Wednesday in May.....Do it to your spouse but it’s made of a joke....but if he/she takes it seriously that’s on you.....but it has to to be played out for 24 hrs
Boyfriend: I’m breaking up with you

Girlfriend: how could you I loved you so much

24 hrs later

Boyfriend: baby it was a joke I could never leave you

Girlfriend: Awww I love you to baby don’t do that again though

Boyfriend: what it’s national break up day

Girlfriend: ......
by David feldabeldum June 5, 2019
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a day on september 4th when anyone can beat up a antifur and they cant fight back
im going to really love beat up a antifur day
by scrungthebung August 10, 2023
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The day you break up with your girlfriend. The official date is February 13, so that you can save the cost of flowers and candy normally expected on the next day by the girlfriend. Spend the money on yourself and enjoy IBUD day.
"International break up day" will free up some money this year. On Valentine's day, I will reward myself with a Bass Boat, Harley, or Hooker. I deserve it because I am a financial genius. Long live IBUD day!
by Spiritual-Master December 27, 2022
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