Anytime you (or someone else) is trying to look casual but are secretly flexing in a picture or pose to make your muscles (usually arms) look bigger. This includes but not limited to, a hidden clinched fist to make your biceps look bigger, and also having your arms pressed against your body to make them look bigger.
Look at that guy, who is he trying to kid. His arms are not that big. He's just doing THE SILENT FLEX.
by ColeManND87 January 16, 2015
Get the The Silent Flex mug.When someone doesn’t brag, doesn’t show off, doesn’t even try, but still ends up making everyone else feel under-leveled just by existing. It’s the kind of natural aura that says, “I’m not trying to impress you… But you’re impressed anyway.”
“Bro walked into class with messy hair and no effort, and suddenly the whole room went quiet. That’s silent flexing.”
by minghaochihiro November 26, 2025
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