noun, verb — 7 senses
UK /ˈjəʊ.jəʊ/ · US /ˈjoʊ.joʊ/
Etymology Genericized trademark. Most likely from Ilocano yóyo, or another Philippine cognate.
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.
Informal Someone who vacillates.
Aeronautics, Aerospace, Aviation, Business, Engineering, Government, Military, Natural sciences, Physical sciences, Politics, War A dogfighting maneuver involving the attacker temporarily exchanging altitude for airspeed, or vice versa, in order to rapidly catch up with the defender or to prevent an overshoot.
Business, Manufacturing, Sewing, Textiles A cloth rosette formed by gathering the outside edge of a circle of fabric in toward the centre using a running stitch.
Informal A foolish, annoying or incompetent person.
Etymology Genericized trademark. Most likely from Ilocano yóyo, or another Philippine cognate.
To vacillate; to move up and down.
Entry derived from the Wiktionary, under licence CC BY-SA 4.0 — list of authors.