I'm not the passive aggresive type, usually all my cards are on the table.
But when I am too tired to argue, discuss or expect that a comment will go that way, I tend to sigh. When I am getting crap answers, I will sigh.
Example:
Me - "How was your day?"
Him - "Why?"
Me - "No reason, just wondered how your day was"
Him - "Same as any other day"
Me - Sighhh
It indicates how tired I am with conversations like that. I guess it is a poor way to communucate, but the alternative would be something nobody would want to hear.