A term used prodominantly in Dublin to express disapproval/disinterest.
Bollix is the pronunciation of the word "Bollocks", used in Britain as a discription of testeicles.
In Dublin Bollix can be used to describe both testicles or an individual.

See also: "Will you ever fuck off, and ask me fuckin bollix?"

Or

"That fella's only a little fuckin Bollix"

when you're hungover as shit after a spending a night drunk as a skunk