any degree of unpleasant attitude that's conveyed through words or body language and can include such language as being sarcastic, cynical, pissy, angry, resentful, displeased, unhappy and on and on.
"so what time are you coming over?"
"no time if you keep giving me that tude!"
"whoa, it's much too early for the tude! wait till after ten to get started with all that nonsense!"