research question: ameripicking

To the Americans on my flist:

If somebody says something and you think it's complete bullshit, what do you say? In English, you would say rubbish. Would you say this in American English? Would you say nonsense? What would John Sheppard say?

I can't use the word bullshit, for various reasons. And I can't use more than one word.

Thank'ee kindly, ma'ams.