Meanings:
noun
Definition: 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.
Example: I bought a yo-yo from the toy store yesterday.
Definition: A volatile market that moves up and down.
Definition: Someone who vacillates.
Definition: A cloth rosette formed by gathering the outside edge of a circle of fabric in toward the centre using a running stitch.
Definition: A foolish, annoying or incompetent person.
Example: It is hard to watch the management for very long and not conclude that the place is run by a bunch of yo-yos.
verb
Definition: To vacillate; to move up and down.