Typically occurs on October 30th, the night before Halloween in North America.

Smashing Day' or 'Smashing Night' refers to delinquent acts of vandalism on residential Halloween Jack-O-Lanterns set outside by individuals. The Jack-O-Lanterns are removed from the homes or porches and smashed into the homes' exterior wall, the nearby sidewalk or street. Individuals participating in 'Smashing Day' are typically children aged 14-17.
"Hide the kids' pumpkins George..today is Smashing Day!"
by Christopher Majewski February 16, 2008
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Day for sex.
"Guess what Baby?" "What?" "It's smash day, get the condoms!"
by Mikey3434 November 27, 2014
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Every March 31 you have to ask someone if they want to smash
Yo it’s National Smash day, you should totally ask if Nat wants to smash!
by Bobbylongdck April 11, 2018
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On April 20th is National smash day. Grab your boo and get to smashin'. Also show some love for the virgins.
Jimmy: it's 4-20-18

Morgan: huh?

Jimmy: that means it's National smash day.
Morgan: ohh 8=====D
*Repeatedly Smashin'*
by Filopthe69th April 10, 2018
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smash all the owens as hard as u can.
“did u hear tommorows smash owen day.”
by hairyasshole22 September 19, 2019
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