The Boo command causes you to:

>boo
You boo loudly.
Autumn boos loudly.

>boo Player
You loudly boo Player
Autumn loudly boos you.

>boo aut
You loudly boo yourself.
Autumn loudly boos herself.

>boo ring
You loudly boo a brilliant white gold wedding ring set with a single heart-shaped diamond.
Autumn loudly boos a brilliant white gold wedding ring set with a single heart-shaped diamond.