A spell in the 5th edition of
DnD, which allows a bard to damage a creature by insulting them.
Essentially, it's a way to
kill creatures using
deez-nuts jokes.
DM:
The dragon is bloodied and seems like it's on its last points of health. Bard, you're up.
Party: Please,
don't use Vicious Mockery...
Bard: He fat.
Dragon: dies.
And that's how we stopped playing
DnD.