sly

sourire malicieux

a smile that suggests you are being secretive or mischievous

un sourire qui suggère que vous êtes secret ou espiègle

sourire en coin

a smile that shows you know a secret

un sourire qui montre que vous connaissez un secret

regard en coin

a glance that is cunning or secretive

un regard rusé ou secret

clin d'œil malicieux

a wink that suggests a shared secret or joke

a subtle, critical remark made in a clever way

humour subtil

a type of humor that is subtle and clever

un type d'humour subtil et intelligent

esprit malicieux

the ability to say clever and amusing things