unfortunately Eskimo i think the definition of stick stirring will cover any evasive maneuver employed in a successfull manner which allows you to avoid and defeat your opponents attack. Stick Stirring will have as many definitions as there are people who get upset because they missed their shot due to their opponents unwillingness to fly straight and "take it like a man".
in my opinion, i think the truest definition of stick stirring is gonna fall into the area of anyone whose motions with stick and rudder are so drastic, dramatic and rapid that they;
1 lose so much E and forward momentum that you unintentionally hang in space without the ability to maneuver at all
2 lose control of their ride and tumble through the air taking an exaggerated amount of time and alt to regain control, if you manage to regain control at all before you auger in or get shot to pieces;
3 have their controls lock up and they get the "do not move your controls so rapidly" message
now obviously there are other occasions that would not be considered stick stirring which would cause similar effects, i.e.the F4's ability to hang in space, improperly scaled stick and/or rudder giving unwarranted warning messages, maneuvering in a damaged ride etc etc, but if you are in a close up fight and your actions of evasion cause these effects unintentionally then to me, you were stick stirring and paid the price for it.
well that's my own opinion and is worth just that.