My son Ethan has learned an interesting trick from me when trying to get out of something he doesn't want to do. Rather than explain it, I'll give you a real life example from yesterday.
Me: Ethan, it's time to pick up your toys.
Ethan: Mom, I can't right now. I'm working. (With hand palm- out, as in "Don't bother me.")
Me: Working? On what?
Ethan: My compooter.
Hrrrmpphh. Why could the kid not learn work ethic? LOL