What are some funny euphemisms for stating a person lost or was bested badly?

Skunked.

They are toast.

Flatter than a bug on my windshield.
That spanking was so hard your grandma felt it.
Looks like you will be eating your food through a straw from now on.

The fat lady is singing.

Sent to the showers.
Took a powder.
Got trounced.
Been schooled.
Stabbed and slabbed.
Beaten like a bad dog.
Creamed like good tea or bad corn.
Hung out to dry.
Swatted like a housefly.

I’ve heard both, “Beaten like an egg” or “Beaten like a redheaded step-child”.

-Done, son.

…all over but the shouting…

I always heard it as “all over but the crying”.

^ I guess that is from the perspective of the loser than the victor; the loser will be crying, the victor will be whooping it up.