The name Fifi is a girl's name of Spanish, French origin meaning "Jehovah increases". Fifi and is often added to lists like Bad Girl Names and discussed in our forums with posts like "ALPHABET Drop 2 Add 1 - Girls".
From the experts:
Fifi is a perfect name -- for a French poodle. But Fifi may seem more child-friendly as names like Coco and Lulu rise. Fifi in its fluffiness also balances the seriousness of such full names as Josephine or Federica.