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.

(intransitive) To vacillate; to move up and down.

Third-person singular simple present indicative form of yo-yo

plural of yo-yo

simple past tense and past participle of yo-yo

present participle of yo-yo

A series of failed diets that cause a person to lose and gain weight alternately.

(computing, slang) The condition of having repeated intermittent failures, such that the system alternates between being up and down.

(aviation, military) A dogfighting maneuver used to increase the closure rate of the attacker during a turn, involving the attacker temporarily giving up some altitude to simultaneously increase airspeed and allow them to turn more steeply, enabling the attacker to cut across the defender's turn and catch up with the defender.

(aviation, military) A dogfighting maneuver used by a rapidly-closing attacker to avoid an overshoot during a turn, involving pulling up into a climb to exchange airspeed for altitude and allow the attacker to make a slower, tighter turn and drop back down behind the defender.