He seemed friendly, but he was a real snake in the grass
Don't trust him; he's a snake in the grass who will betray you
She discovered her colleague was a snake in the grass, stealing her ideas
I thought she was my friend, but she turned out to be a snake in the grass
Be careful who you confide in; there are many snakes in the grass
He played the role of a loyal employee, but he was a snake in the grass working against the company
The politician was accused of being a snake in the grass, making secret deals
She was blindsided by the betrayal; he was a total snake in the grass
Never underestimate the cunning of a snake in the grass
He's not the person you think he is; he's a snake in the grass
I did not expect that betrayal from him.
He was a snake in the grass all along.
I should have seen it coming.
He seemed friendly, but he was a snake in the grass
He seemed friendly, but he was untrustworthy and deceitful
Despite his nice demeanor, he was secretly treacherous