snake in the grass

Found in Anh - Anh (Wordnet)

Definition Noun : A deceitful or treacherous person; someone who pretends to be a friend but is secretly an enemy or is working against you. This term describes a person who hides their true, harmful intentions. Usage This term is used to label a person who is perceived as secretly disloyal or dangerous. It is a strong, critical, and often emotional label. It functions as a compound noun and is...