1: Billie Eilish's date of birth 2: Celebration day; Just celebrate anything, eg. trees
1: Its December 18th tomorrow, this time we're celebrating trees. 2: Its December 18th tomorrow, Billie Eilish's birthday!
by dxfxnxtixn October 28, 2019
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The UK date. You're a real king or queen. Top notch, the life of the party.

You rank 161st on that Japanese lucky birthday scale, but regardless of your average luck you always come out on top.

You do you my friend. Stay awesome.
"Bet you were born on 18th December . Weren't you."
"You bet."
by Thebestofbois October 15, 2019
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national get deadly drunk with your bestie day
bestie:it’s 18th december
you:so what?
bestie: let’s get nasty drunk
by partyyy all night December 15, 2021
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Chaosboitm or chaosboitem's birthday. Marga is god.
Hey what day is it?

It's December 18th, chaosboitem's birthday!

Oh it's God.
by Artyrhene December 18, 2020
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National No Work Day! On this day you don't have to do any work!
Teacher: Now get out your workbook!
Student: But it's December 18th, National No Work Day!
by A-Flying-Saucer January 7, 2021
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The day you hit someone shorter than you
Kid shorter than me oh shit it's December 18th
by December 18, 2020
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The day you hit someone shorter than you
Kid shorter than me oh shit it's December 18th
by December 18, 2020
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