A phrase added after any adjective to make it stronger.
Perhaps started by people trying to be less vulgar than using "as fuck" or "as shit", but still wanting to use a dirty word.
The resulting phrase doesn't have to have
anything to do with
testicles or their qualities; it's almost better when it's very un-
ball-like, because it makes other people stop and think how your phrase doesn't make sense.
I'
m hungry as balls!
Dude, your mom is hot as balls.
I was sick as balls last night.
It's cold as balls out here!
It's cold as balls are not!