A threatening admonishment, directed at an adversary, that the "that" in question will turn an argument physical.
don't do that.
To cause something bad to happen, then to attempt to cover it up, followed by deception, lies, accusations, then finally bullying, in order to deny responsibility.
Bobby broke his little sister's special doll. Bobby decided to do a china to his sister so that he didn't get into trouble for breaking the doll.
An exclamation scientists from Half-life say from time to time.
Gordon: *hits scientist 1 with a crowbar*
Scientist 1: ARRGH
Scientist 2: MY GOD, WHAT ARE YOU DOING?
Used when someone is annoyed at someone
Guy: Turns off light when someone is still in the room
Other guy: What are you doing?
si stop taking you can’t tell me what to do so shut up
shut up you can’t tell me what to do