donner sa langue au chat*
* to give one's tongue to the cat
French speaking countries
Indicates that you don't have the answer to a question or don't want to try to guess it anymore.
"M. & Mme Gator ont un fils, comment s'appelle-t-il?" "Je donne ma langue au chat!"
"Mr & Mrs Gator have a son, what is his name?" "I give my tongue to the cat."
Submitted August 2020
Confirmed by 4 people