What does it mean "U R ballacks"

[haselo]

I mean "ballacks" in this context, it could be also "bullacks" as I didn`t
hear exactly

U R ballacks, you know that? What goes around comes around

THX :)

[nasza_maggie]

tinyurl.com/dl9bu
The word you mention is british slang often used to offend someone or to
describe 'making a mess of things'. That depends on the context in which you
use the word.

[gosiash]

It looks like the person who said it to you doesn't like you ;) And second
sentence suggests that she/he has got a reason not to like you. You've done
something nasty to her/him didn't you.