"sick flex" is a reference to two pop culture points of interest. "sick" refers to the mid charting hit "Down with the Sickness" by Disturbed that broke the Billboard top 20 in 2007. "flex" is an homage to the late Billy Mays due to his relentless pontificating on the water-resistant properties of the made-for-tv product Flex-Seal. In essence, you are both down and sticky, a condition we refer to as "Peter Northed".
You got your hands on a 3070 RTX? Sick flex bro!
by Indexfossil May 6, 2021
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It's flexing but the person doesn't exactly notice. You do though, it makes you feel bad about yourself, sometimes.
Lily: "Oh my gosh! My 2 Ipads couldn't work, so I brought 2 more. And remember when I was in 1st grade? I dissected a cow eye!"
Me: "That's cool, I guess. You also already said that story of dissecting a cow eye over 100 times, I don't want to hear it anymore."
Me (thoughts): "She's blindly flexing again . . . "
by odd, nefarious dumbass November 4, 2022
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When you flex by accident or you didnt mean it.
A: Bro why did you destroyed the dumbells ?
B: Sorry, got massives gains recently, didnt meen to accidental flex.
by Bill_Claymore March 8, 2023
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While often used derogatorily against others as an accusation of hyper masculine overcompensation, when used in the first person it indicates a willingness to forcibly overcome an overwhelming challenge or highly favored opponent through the use of ones ego.
Mike always trying to flex nuts around school but nobody scared.

Don't matter how many friends you bring, your whole little Gaggle of followers can eat shit. I flex nuts son. Come at me.
by Joshamaphone July 29, 2023
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