The term 'GENTLE AS A LAMB' is a phrase used to describe someone or something that is very gentle and kind. It is often used to describe a person's behavior or demeanor, as well as the behavior of animals, such as a LAMB. The phrase is derived from the Bible, where Jesus is described as being 'gentle as a LAMB'. This phrase is also used to describe someone who is very calm and peaceful, and who is not easily provoked.