a. abbreviation for religious nut
b. a person who is a religious fanatic
or a religious zealot
c. a person who pushes his/her religious view points upon others but rejects considering the religious or non-religious view points of others
d. a person who has surrendered his/her thought processes to, normally, ancient belief system(s) based on old, unsubstantiated word-of-mouth stories
During a break from rehearsals at school, this relnut suddenly appeared and began proselytizing to the cast.
While discussing the lyrics to one of the Beatles' songs, a relnut from within our group stated that, if you play their songs backwards, you'll hear satanic messages.