With snappy comebacks and spontaneous one-liners, the Jester is always popular.
--Description in Dragon Quest VII.
The Jester (笑わせ師 warawase shi) vocation is a variant of the more common Gadabout, which appears exclusively in Dragon Quest VII. The differences between Jesters and Gadabouts is that the former have slightly more utility in battle through the skills they learn and that both sexes dress as clowns where lady Gadabouts dress as bunny girls.
The Jester is one of the basic vocations available. Mastering it is a prerequisite to unlock the Luminary vocation, along with Dancer and Troubadour. The Jester's attributes decline in all categories save for style which might be hard to deal with at first and the skills aren't worth using, but the vocation is required for a character to become a Luminary and then a Druid later on. When Ruff is a jester, his wolf has a clown's red nose.