Juggler is a job available to moogles. Jugglers use special items against their foes, and almost all of the items inflict a status ailment. Their Dagger ability, inflicts the Disable status and damages the opponent, making the Juggler a good job for stalling.
Juggler is a job exclusive to moogles. It could be viewed as the moogle equivalent of the Ninja, with similar stats and focus on weakening foes. They throw random things that can be either beneficial for the party or destructive for the opposing clan.