The joy one feels when bad things happen to other people.

or

The act of deriving pleasure from someone else's misfortune.

Orgin = German: Schaden, damage (from Middle High German schade, from Old High German scado) + Freude, joy (from Middle High German vreude, from Old High German frewida, from fr, happy).

German for unanticipated delight in the suffering of another which is cognized as trivial and/or appropriate.

Simply it is pleasure derived from the misfortunes of others.

The joy, existential validation, and downright delicious pleasure received by watching, reading of, hearing of, or even, occasionally, causing an enemy's downfall. And by enemies, I mean also friends.

getting off on others' misery

The pleasure someone gets for seeing another person clean a wall with an ear stick

German for enjoying someone else's pain.

It's German for happiness at the misfortune of others. Very Nazi if you ask me.