Definition of "arsed"

You can keep all the macho bollocks that goes with the job. I can't be arsed who thinks what of me to be perfectly honest and I have no time for those that are.

2008, Guy Cullen, Loose Ends, page 2

[…] but here's the way you're supposed to run it: make out like it'll be a long, drawn out process, that you can't be arsed and that they shouldn′t be arsed because it'll probably end up doing fuck all except getting a copper pissed off at them.

2011, Ray Banks., Beast of Burden, page 133