By the way. Used to introduce a side remark or a related-but-tangential point, often as a softener before changing the subject or slipping in an extra request. Extremely common in casual chat, email and forum posts; one of the oldest internet abbreviations still in heavy daily use.
BTW, did you remember to cancel the trial before it auto-renewed?
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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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