quicko: can't be bothered

This is by far my favorite Aussie phrase I can't use. It's ridiculously useful, and yet, on the basis of my Americanness, it is entirely off-limits for me. It means roughly, "I'm way too lazy to do this and so I'm not going to, so deal with it," or possibly, "I didn't actually hear what you said, and I have no intention of doing whatever it is you want me to do," or more accurately, "yeah, whatever." It's wonderful, yet it's not in my vocabulary. I can't use it, and I desperately long to, but, like any self-respecting American, can't bring myself to say, "no, I'm not going to do that because I just don't feel like it." I simply can't be bothered.