can't be arsed. used when you really cant be bothered to do something proposed to you.
also a foolproof excuse to get you out of any social event you really dont want to attend.
matey: ere m8 you comin dan the club
matey2: nar m8 cba
matey: fair nuff m8
By Guillemette
Cba
Can't Be Arsed. Unwilling to expend energy on the task in hand. May be used more generally in reference to the state of mind where nothing at all seems remotely worth doing.