When out at a meal with a bunch of friends, my ex-friend (never popular -known for rudeness!) once asked if she could taste my chilli con carne, I said 'of course' and she proceeded to take a huge forkful and then pronounce loudly 'UGGHHH!! That is SHIT'.
I was left to 'enjoy' the rest of my chilli after that!
Anyone got/had a friend/relative with worse manners?