What is the meaning of Bollocks?

The testicles (sometimes used in the singular)

Nonsense or information deliberately intended to mislead.

An idiot, an ignorant or disagreeable person.

Ellipsis of the dog's bollocks.

To break.

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

An expression of anger, frustration, etc.

An expression of incredulity.

third-person singular simple present indicative of bollock

Source: wiktionary.org