The clip is listed as a John Mulaney sound, and its appeal comes less from a long scene than from how easily the two-word phrase travels online. Short comedy lines like this are often clipped, shared, and reused in edits because they work without their original context, and street smarts has become a handy shorthand for calling out questionable judgement with a straight face. Its continued use in reaction videos, gaming clips, and short-form edits reflects that portability: a single dry label can finish a joke that the visuals have already set up.