The term "bible thumper" is a derogatory expression used to describe someone who is overly enthusiastic or zealous about their religious beliefs. The use of this term implies a certain level of intolerance or close-mindedness. Antonyms for this phrase could include terms such as "tolerant," "open-minded," "accepting," and "non-judgmental." These words suggest a person who is less rigid in their religious beliefs and more understanding of others' varying perspectives. Other antonyms may include "moderate," "balanced," "reasonable," and "level-headed," all of which bespeak a more measured approach to religious belief and practice.