National post a fake ass friend day is where you post a friend who you know is fake, if participating you’re expected to post something on several social media platforms e.g. Instagram, Snapchat, Facebook and others.
“Hey it’s national post a fake ass friend day
“Oh, I better post Ella then”
by 000000000500000000 November 9, 2021
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On May 14th you post an embarrassing/awkward photo of your bestfriend(s) on any social media.
For eg. *insert picture* caption: Happy National post an embarrassing photo of your friend day!
by niamhiglol April 13, 2021
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Today is the day to post your girl best friend and show her how much she means to you. Guys, post her and tag her in it so that everyone can know that SHE is your girl best friend. No ugly pictures of videos that she won’t like, only pretty ones she will enjoy! January 10 is the day!
john: yooo I just posted you on tiktok!
lacy: why?

john: January 10!!!
lacy: what does that mean?

john: its national post your girl best friend day!
by smart1.com January 9, 2021
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It's a day where you post a snap video of yourself doing squats at your story on snapchat!
Random dude on snapchat: Wtf did you post on ur story?

Girl: it's national post urself doing squats on snapchat day!

Random dude: Oohhh, hold on..
by Some random doebdjcj November 1, 2020
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On December 26, post your thickest friend, girlfriend, or best friend. This day is for the thickest of the thick.
I posted Beyoncé today, she’s thick.
I love National post the thickest girl you know day.
by Thick girl day December 26, 2020
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