Where Does the Term Bollix Come from?

Originally, the word "bollocks" was the everyday vernacular word for testicles—as noted above, it was used in this sense in the first English-language Bible, in the 14th century.

What does the British word Bollix mean?

transitive verb. : to throw into disorder also : bungle —usually used with up.

What are origins of the word bollocks?

bollocks (n.)

"testicles," 1744, variant of ballocks, from Old English beallucas "testicles," from Proto-Germanic *ball-, from PIE root *bhel- (2) "to blow, swell." In British slang, as an ejaculation, "nonsense!" from 1919.