(n)addict, nut, freak, junkie, junkysomeone who is so ardently devoted to something that it resembles an addiction“a golf addict”, “a car nut”, “a bodybuilding freak”, “a news junkie”
(n)testis, testicle, orchis, ball, ballock, bollock, nut, eggone of the two male reproductive glands that produce spermatozoa and secrete androgens“she kicked him in the balls and got away”