CON Stunned, Stunned & STUN
In the groups I played, you were "stunned" (CON +1 or more STUN in one hit), "on the ropes" (1 to 10 STUN "in the negs"), or "K-O'ed" (more than 10 negative stun). While I might not like it when someone uses a term that I refuse to under most circumstances, as long as I understand what is meant, the phrase has done its work. If I draw the conclusion that someone using the objected-to (yet apparently widely-used) term is therefore stupid for using it, that's my problem, not theirs.
Actually, the only thing I don't like about 5ED is that the book is significantly larger and heavier than 4th edition. I like much of the added material, but it doesn't seem as easy to look things up as the previous edition was. Portability, folks! I hope they remember that when they publish 6ED.