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Nah, it's a gaming term that goes back to at least 2006 (first I'd seen it). When you're grinding 10 hours on some new raid in WoW it was common to say "brb bio" or "Everyone take a 5 min bio break" etc.

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We said it in FFXI a few years before that. I thought maybe it was a pun since the game has a spell called Bio and people would highlight the word using the auto-translate function, but I just checked and this says the term dates back to the mid-90s:

https://www.merriam-webster.com/wordplay/bio-break-meaning-a...

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