Dud

Dud is a recurring ability in the Final Fantasy series. It is an undesirable ability as it causes various objects to fall on the player party's heads, inflicting damage. It is synonymous with the Gambler job class and is used whenever the player fails to match three of the same symbols in a row when using the Slots ability.

Crisis Core -Final Fantasy VII-
Dud inflicts a small amount of damage to Zack and may also inflict the Stun status. Dud may sometimes activate when the Digital Mind Wave enters Chocobo mode, but fails to match the symbols.

Final Fantasy X-2
Dud is a particularly dangerous Lady Luck ability as it removes 75% of all allies' current HP. It is used when no symbols are matched in any of the Slots abilities.