(also bollocks up) To fail (a task); to make a mess of.
To break.
An expression of anger, frustration, etc.
An expression of incredulity.
An idiot, an ignorant or disagreeable person.
The testicles (sometimes used in the singular)
Nonsense or information deliberately intended to mislead.
To ruin unintentionally.
To clown around; to have fun, often at the expense of others.