ballocks

/B AE1 L AH0 K S/
noun
  1. 1

    The testicles (sometimes used in the singular)

  2. 2

    Nonsense or information deliberately intended to mislead.

  3. 3

    (used as singular) An idiot, an ignorant or disagreeable person.

  4. 4

    A contraction of the dog's bollocks.

verb
  1. 1

    (taboo) To break.

  2. 2

    (taboo) (also bollocks up) To fail (a task); to make a mess of.

Source: https://en.wiktionary.org/wiki/ballocks, https://en.wiktionary.org/wiki/bollocks