bollock sack vs bollocks

bollock sack

• The scrotum. 

bollocks

• The testicles (sometimes used in the singular) 

• An idiot, an ignorant or disagreeable person. 

• Nonsense or information deliberately intended to mislead. 

• An expression of anger, frustration, etc. 

• An expression of incredulity. 

• To break. 

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