The line comes from The Hangover, the 2009 comedy in which Zach Galifianakis plays Alan Garner, a socially awkward member of a Las Vegas bachelor party whose literal-minded remarks repeatedly steal scenes. The quote circulated as a short soundboard clip because its prim objection to bad language is easy to lift out of context and drop into almost any argument, rant or gaming moment. It has stayed popular because the joke does not depend on knowing the plot, only on hearing a grown man politely object to swearing.