The exact original recording is not widely documented, so the clip is better known by its catchphrase than by a named source. Its humour comes from everyday French street slang, c'est quoi ça shortened to c quoi ca, followed by a drawn out non and an English what, a mix that mirrors how younger speakers switch languages online. Shared as a short reaction audio on soundboards and in edited videos, it spread because the phrase needs no context and can be pasted over almost any confusing, gross or unbelievable visual moment.
About this sound
A confused voice shouts c quoi ca then nan whatt in French and English, a meme sound effect used to react to something weird, shocking or hard to believe.
This is a short voice clip built entirely around disbelief, starting with a fast, high pitched c quoi ca as if the speaker has just seen something completely out of place. The delivery gets louder and more stretched out on nan whatt, mixing French slang with an exaggerated English what that drags at the end. There is no music or background effect, just the raw vocal reaction and its rising panic. That sudden jump from confused question to outright rejection is what makes it funny, instantly signalling to viewers that whatever just appeared makes no sense at all.
