Flex Day 

December 26th is flex day. Show off all of your expensive items to your friends. You can also flex with the new items you got at Christmas.

"Billy it's December 26th which means it's flex day, I bet you don't have the iPhone 11 Pro Max."
Billy answered while holding back tears, "you're right Joe, I don't."
Billy replied, "wait, who's Joe?"

Flex Day by Andy Andy October 27, 2019

international flex day

On April 26 it is international flex day a day to flex all the rad shit you own

Yo today is international flex day ima flex hard

international flex day by Flex god w May 30, 2018

International Flex Day

8th June is the international flex day, whereas you may flex on anybody.

Yo today's the international flex day. Imma flex on my snapchat story

International Flex Day by Psychologial Facts June 8, 2020

National flex your muscles day 

April 19 is when you send a friend, partner or someone you trust a picture of you flexing ur muscles.

*sends a picture of big booty flex*

wow! Happy national flex your muscles day! Here is one too ;)

National flex your muscles day by Nukemaster69 April 19, 2022