Thanks, everybody for the nice choice of expressions. If I'd known I'd get so many suggestions, I'd have started a whole new page in my little notebook rather than try to squeeze it all in near the bottom of the page.
Yes, "à faire grincer des dents " is good and, like id, I do know someone who very often "me donne envie de vomit" as well!
I do know, unavoidably, this couple who can simultaneously make me want to do both of those things He is as dim as a toc-H lamp (expression learnt from OH) and she is more often than not, as exhausted as a newt.
But, what I really, really wish is that she'd stop claiming that French words all sound the same and giving the example of "la mère", "la mer" and "la ***" as though she'd just told the funniest joke in the world. After the first half dozen times of saying no actually they all sound completely different, I now just do that thing with the teeth as per Norman's suggestion.
The other joke, which I won't repeat because I'd just grind my teeth some more, is based on her contention that "souris" and "cerise" sound exactly identical. Grrr.....best go and take my prednisolone tablets now or I will break out in a rash all over again
N'allez pas trop vite - Proust