Bible-thumper

[bahy-buh l-thuhm-per] /ˈbaɪ bəlˌθʌm pər/
noun, Informal.
1.
an evangelist or other person who quotes the Bible frequently, especially as a means of exhortation or rebuke.
Origin
1920-25
Related forms
Bible-thumping, adjective
British Dictionary definitions for Bible-thumper

Bible-thumper

noun
1.
(slang) an enthusiastic or aggressive exponent of the Bible Also called Bible-basher, Bible-pounder, Bible-puncher
Derived Forms
Bible-thumping, noun, adjective
Word Origin and History for Bible-thumper
n.

"strict Christian," by 1843.