The line comes from the animated comedy South Park, spoken by school counselor Mr Mackey, whose mmkay catchphrase has been a running joke since the show began in 1997. In context the warning exaggerates a local problem into a massive lawsuit against the whole town. Clips of Mackey reactions circulate widely as soundboard sounds and meme edits, and this short excerpt became popular for legal jokes because the quote works completely out of context, needing no setup to understand the threat.