Mumbo Jumbo, mumbo jumbo, mumbojumbo or Mumbo-Jumbo can refer to:
- Mumbo-Jumbo (YTMND user), a YTMND user who make advant garde sites.
- Mumbo-Jumbo (character), the character who spun off from the YTMND user.
- a slang term for spamming users' PMs with nonsense, of which an infamous example would be The Mumbo-Jumbo PM Spam Incident Of 2015, associated with the above user.
Outside of YTMND
- a slang term for written or spoken words that are hard to understand.