take something with a grain of salt
idiomPart ofgrain
take something with a grain of salt — idiom
1. To not completely believe what someone says because it might be untrue.
1.idiom
Definition
To not completely believe what someone says because it might be untrue.
Example
Brian took the rumors with a grain of salt until he saw proof.
You should take his advice with a grain of salt; he is not an expert.