Just remembered seeing an old Have I Got News For You clip on Youtube and I can't remember who it was but Angus Deayton had a little light-hearted dig at one of the panelists and she replied with something that was true but probably a bit overly defensive and Angus Deayton said 'touché... or should i say touchy.'

I thought that was very good. Probably not the wittiest thing I've ever heard though.