suspicious, shady
Il se passe quelque chose de louche ici.
Something fishy is going on here.
C'est louche, elle est trop gentille.
That's suspicious; she's way too nice.
— Terminator 2 : Le Jugement dernier (1991)
That looks suspicious.
La relation entre Tom et Marie me paraît être la plus louche.
The relationship between Tom and Marie seems to me to be the most suspicious.
Il y a quelque chose de louche dans l'affaire.
There's something fishy about the whole affair.
— Assurance sur la mort (1944)
J’ai cru que t’étais un vieux type louche qui essayait de me draguer.
I thought you were some shady old guy trying to hit on me.
— The Shadow's Edge (2025)
L'histoire du pêcheur est louche.
The fisherman's story is fishy.
Tout le monde savait que ce gars-là était louche, sauf toi.
Everyone knew that guy was shady, except you.
— La La Land (2016)