a snake in the grass
idiomPart ofgrass
a snake in the grass — idiom
1. a person who pretends to be your friend but secretly cannot be trusted and may b
1.idiom
Definition
a person who pretends to be your friend but secretly cannot be trusted and may betray you.
Example
Nia trusted her colleague completely, only to discover later that he was a snake in the grass who had stolen her client list.
Be careful who you share your plans with — there may be a snake in the grass among your own team.