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thumper
Bible-thumper
A derogatory term for a person who uses his or her Christian beliefs or Bible passages to try to influence others' opinions. Primarily heard in US. After Mary started spending more time with her church's youth group, her friends from school began to complain that she had become a bit of a Bible-thumper
a Bible-basher
(British & Australian informal) also a Bible-thumper (mainly American informal) an insulting way of describing someone who tries very hard to persuade other people to believe in Christianity I have nothing against religion, but I hate Bible-bashers.