The Brief: "Weird flex but ok," is a phrase used to respond to strange things online.

DEEP DIVE
“Weird flex but ok” is a sassy response to someone flexing or showing off. The phrase is often used in jokes on Twitter.
automatic toilet: *flushes before I even sit down*
me: weird flex but ok— alysse ๐ค (@alyssemazakian) October 2, 2018
https://twitter.com/racheleshh/status/1047676744541638656
My wife: Iโm leaving and taking the kids with me
Me: weird flex but ok— Sonny Side Up (@Sonny5ideUp) October 4, 2018
jay gatsby: *throws a big ass mansion party every week in hopes of seeing daisy again*
daisy: weird flex but ok— kawhi leonard come to the clippers (@deepwebted) October 3, 2018
my uterus: bleeds for 5 days to let me know iโm not pregnant
me: weird flex but ok— sarah๐ (@SaarahKempf) October 4, 2018
-seeing other people living happy, successful, and fulfilling lives-
me: weird flex but ok
— follow me only if youre alone (@lridaed) October 1, 2018
Michigan: *is 30 degrees in the morning and 80 in the afternoon*
Me: weird flex but ok
— Kate (@yergirlkate) October 8, 2018