A buff check is a quick visual or physical assessment of someone's physique — scanning their arms, chest, or overall build to gauge how much they've been hitting the gym. Online, buff checks happen in comment sections when someone posts a photo and gets appraised by the fitness community. The term borrows 'check' from gaming (where you verify a character's stat screen) and applies it to real-life musculature evaluation. Passing a buff check means your gains are visibly real.
Posted a beach photo and immediately got a buff check in the comments — apparently the back gains are showing and I'll take it.
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Viral internet speak — memes, ratios, main-character moments, and the algospeak of every platform from Twitter to Reddit to TikTok comment sections.
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