The line comes from HBO's The Sopranos, the acclaimed crime drama that ran from 1999 to 2007, with James Gandolfini as mob boss Tony Soprano. Short dialogue clips from the series became popular on soundboards and in meme edits, where fans reuse Tony's calm, intimidating delivery to react to arguments and overreactions. Because the phrase is short and instantly recognisable, it works as a quick punchline in videos, streams and group chats. It remains in use as a shorthand for telling someone to calm down without losing control.