un loup déguisé en agneau signifie anglais

wolf in sheep's clothing▼◼◼◼(someone or something harmful or threatening but disguised as something peaceful or pleasant)
noun
[UK: wʊlf ɪn ˈʃiːps ˈkləʊ.ðɪŋ] [US: ˈwʊlf ɪn ˈʃiːps ˈkloʊ.ðɪŋ]