a snake (in the grass)
US /ə sneɪk ɪn ðə ɡræs/
UK /ə sneɪk ɪn ðə ɡræs/
1.
陰險小人, 兩面派
a treacherous or deceitful person, especially one who feigns friendship
:
•
I thought he was my friend, but he turned out to be a snake in the grass.
我以為他是我的朋友，但他卻是個陰險小人。
•
Be careful of him; he's known to be a snake in the grass.
小心他；他是個出了名的陰險小人。