1. An expression of disbelief or annoyance.Can be used in the same way as bollocks!
2. A rebuttle of a shit comment made by another person who may or may not be a generic numpty.
What a load of old ballbags. Ballbags mate. Stop talking ballbags. That's ballbags.
For extra emphasis: Saggy ballbags mate!
Hairy ballbags!
Ballrash normally occurs after rubbing your scrotum against your sex partners partly shaved bearded dragon. This practise is a result of not wanting to shoot a load into your partners vaginal area but rather pull out rub your srotum along the partly shaved hairy bicycle rack to shoot your load over the stomach and breast region of your partner.
'I pulled out the other night and have the MRS and ballsack rub on her partly shaved pussy and ended up with ballrash'
when you're holding up your phone and making faces at it, as though you are taking a selfie, but you're really taking a picture of the person across from you or the wall or anything else that seems interesting but you don't want to be caught dead taking a picture of.
This action is often made more convincing by wiggling the eyebrows or opening the mouth, to pretend you're trying to get a Snapchat filter to work.
FRIEND A: "Did you just take a stealthie of me?"
FRIEND B (turning phone around): "no I was just using snapchat's new filter, see?"