The phrase knock it off has been a common everyday scolding in English for decades, and this Hadler version spread as a short meme sound online because of its brevity and clear delivery. At under two seconds it fits reaction videos, edits, and soundboard use without slowing the pace. Creators reuse it as a familiar stop signal, similar to how other short scolding clips circulate on social media, because audiences understand the meaning instantly even without knowing the original context of the recording or who recorded it first.