Lyn's list reminded me of a couple of clangers I have dropped in school.
I once said briskly to my Y11s "Right, coats off everyone. Come on Lloyd, let's have it off"
And another coat comment to a boy who would NOT remove his coat even in summer: "Come on Tom, take off your coat. You're making me hot just looking at you."
I've not been reported - yet ...
What have you said that you wish you could rewind?!!