popularised ~2008-present · 0 terms catalogued
Reddit's threaded comments + thousands of niche subreddits make it slang's most prolific incubator. Acronym discipline (TIL, AITA, NTA, ELI5), pet language (doggo, pupper, birb, smol), and community-specific jargon all started here before crossing to TikTok and Twitter.
We don't have any Reddit-origin slang catalogued yet.