The character 切 is read as qie in Mandarin and is widely used online as a written interjection for a scoff, similar to typing tch or whatever in English. As a standalone sound it spread through short reaction clips, edits and soundboards rather than from a single identifiable film or show. Its brevity is why it stuck, because one syllable can be pasted over almost any awkward pause. It remains popular for light mockery between friends, where the joke is clear without sounding genuinely angry or needing a longer rant to explain the mood today.