Also means
yucky
Usage Note
Caca is child language for excrement ('poo', 'poop') and is also used as an invariable adjective meaning 'yucky' or 'gross' — c'est caca means 'that's gross'. The colour caca d'oie (literally 'goose poo') is a yellow-green shade, used informally to describe an unpleasant hue. The word is entirely childish or humorous in register.
Examples
"L'enfant a fait caca dans sa couche."
Natural Translation
The child did poo in his nappy.

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