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That is the origin of the phrase, but it has since entered colloquial vernacular... as pretty much all terms used on social media do.

The word filters must adapt pretty soon. So we'll get new terms.

The next gen is semantic and sentiment filters, the age of wordlists is over.

I haven't seen that, I find it strange.

You're wouldn't be the first adult to be unfamiliar with slang. Language spreads socially.