You searched for: “touchy
touche, touchy
touche (too SHAY) (interjection)
Used to acknowledge a hit in fencing, a successful criticism, or an effective point in an argument: "At the end of the debate, my opponent called, TOUCHE! because he was convinced that he had put forth a solid, closing argument."
touchy (TUHCH ee) (adjective)
Easily offended; very sensitive; likely to cause people to become upset: "Borrowing from the bank is a touchy subject with some people; especially, during these days of financial instability."

"She is very touchy about the color of her hair whenever anyone says anything about it."

It becomes a very touchy subject when at the very end of the debate, your opponent suddenly shouts out TOUCHE because of a slight oversight on your part.