Etymology

Noun

1. A toy consisting of a spheroidal or cylindrical spindle having a circular groove in which string is wound; it is used by holding the string in the fingers and reeling the spindle up and down by movements of the wrist.
2. A volatile market that moves up and down.
3. Someone who vacillates.
4. A foolish, annoying or incompetent person.

   It is hard to watch the management for very long and not conclude that the place is run by a bunch of yo-yos.