#it's a verb so someone could tell you “de chuchoter” (to whisper)

[tkachunk]

Super left field but since you know french, did you ever have people use chouchoutez to tell you to be quiet or shut up because that is a prime word that my brain has never forgotten because it was used all the time but I cannot find any translation that supports this

chuchoter means "to whisper", could that be what you're thinking of?