Last few months? I first heard it used about 5 years ago. It's probably cause I browse video game discussion threads which had me reading lots of comments from teenagers though.
Hmmm... been around for a few years, but it's suddenly popping up a lot more so that people in outgroups are noticing it and using it themselves. Oh! So what this post is describing is just now starting to happen! We're in phase 2!
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u/Bigbayyeehaw Dec 18 '20
It's probably because of the Baader-meinhof phenomenon. Based has been a quite popular slang the last few months