Disclaimer - I am not a poncetastic twat. Get that in before you lot accuse me. 
At MILs last night, couple of SILs there. My MIL loves champagne, it was a distinct luxury when she was younger and I don't think she bought a bottle until she was in her 40s. Now she is making up for lost time and I always buy her a decent bottle for her birthdays, mothers day etc.
We were talking about different brands, and she was remembering the different ones she has tried, I said that a cheapish one which I had bought from Sainsbos (Charles something) was rated in the Sunday Times as being better than the more recognised brands such as Moet etc.
At which point my SIL laughed scoffingly and said 'I would have thought you would have known that the French don't5 pronounce the t on the end of the word, it is pronounce Mow-AY' (said in full on condescending terms).
I said fuck off dicksplash 'no it is pronounced Mo-ETT, theword is Dutch anyway'
She carried on 'no it's not, champagne is French not dutch, next you will be saying Edam comes from Wales' 
She really got on my tits.