At the grocery store yesterday...
D (loudly): "Did you see that big, FAT man?"
W (MUCH more quietly):"Yes, he was a big man, but people don't really like for other people to tell them they are fat. It would be better to just say he was big."
D: "Even if he really was fat, too?"
W: "Yes, even if he was fat, too."
Good thing I don't embarrass easily, though this wasn't quite as bad as they time she asked me, one by one, if every man on the aisle we were on had a penis.