The phrase comes from everyday Spanish slang, where chsm is an abbreviation people type and say to avoid spelling out a strong insult in full. Clips like this spread mainly through chat apps and short video edits, passed around as a ready made reply rather than as a quote from a known scene. Its appeal is that anyone can understand the intent from the tone alone, even without context. That makes it reusable for arguments, football banter, gaming losses and friendly roasts, which is why short versions keep circulating.