A Shame
You yell ‘shame’ when someone does something stupid, like wearing socks with sandals or talking too loud in a library. It’s the verbal version of giving someone a wedgie.
Shame! You wore socks with sandals and it was a crime against fashion.
Shame! You told the principal I cheated on the test, and it was true.
Shame! You broke the vending machine and now it’s out of chips.