BOLLOCK
bollock, bullock block
(noun) a pulley-block at the head of a topmast
testis, testicle, orchis, ball, ballock, bollock, nut, egg
(noun) one of the two male reproductive glands that produce spermatozoa and secrete androgens; “she kicked him in the balls and got away”
Source: WordNet® 3.1
Etymology
Noun
bollock (plural bollocks)
(British, Irish, vulgar, chiefly, in the plural) A testicle.
Verb
bollock (third-person singular simple present bollocks, present participle bollocking, simple past and past participle bollocked)
(British, transitive, vulgar, slang) To reprimand severely and grossly.
(British, vulgar, slang) To exhaust, tire out.
Source: Wiktionary