You Can’t!

Best definition
You Can’t!
Posh upper class English way of saying, You Cunt!
Oh no you caaaant! The upper class lengthen their A sound.

Female horse rider shouted it out to me as I slowed my lorry as I passed and the air brakes hissed. She shouted it out just as her horse bolted.

And for a moment, puzzled, I thought why did she shout out ‘You Can’t!’