a snake (in the grass)
US /ə sneɪk ɪn ðə ɡræs/
UK /ə sneɪk ɪn ðə ɡræs/
1.
un serpente in erba, una persona infida
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.
Pensavo fosse mio amico, ma si è rivelato essere un serpente in erba.
•
Be careful of him; he's known to be a snake in the grass.
Stai attento a lui; è noto per essere un serpente in erba.