thumbs down
US /θʌmz daʊn/
UK /θʌmz daʊn/

1.
pouce baissé, désapprobation, rejet
a gesture of disapproval or rejection, made by pointing the thumb downwards
:
•
The audience gave the performance a collective thumbs down.
Le public a donné un pouce baissé collectif à la performance.
•
My boss gave my proposal a big thumbs down.
Mon patron a donné un grand pouce baissé à ma proposition.