You're in a shitty mood.
Well, you'll be making your shitty mess alone, because I'm not going to dignify your question with an answer!
I've done some real shitty things, just to keep Molly; things I'm not proud of, but I'll do anything for her.
Spying on his girlfriend is a shitty thing to do.
We we're in this shitty little apartment with drugies down the block.