" A wolf in sheep’s clothing "
Meaning:
Someone who uses the pretence of kindliness to disguise their evil intent.
Example:
He was 38 but tried to pass himself off as a thirteen year old in order to get a date with a schoolgirl - a wolf in sheep’s clothing.
Where did it originate?:
Aesop.
Where is it used?:
Widely used.
Hear the idiom spoken: