Womp

Womp is an expression of disappointment or letdown used to react to something negative. It comes from the low sound a trombone makes to convey sadness in songs, TV shows, and movies.

The term often appears as "Womp womp" and may be spoken out loud or typed in text messages or online. Some examples of when you might use it are when a friend tells you he failed his test, when you spill your drink, or when your dad grounds your sister.