Words with YOY

• a toy consisting of a pair of joined discs with a deep groove between them in which string is attached and wound, which can be spun alternately downward and upward by its weight and momentum as the string unwinds and rewinds

• a person who is stupid or dangerously unpredictable

Synonyms: idiot, halfwit, nincompoop, blockhead, buffoon, dunce, dolt, ignoramus, cretin, imbecile, dullard, moron, simpleton, clod

• move up and down; fluctuate

Synonyms: oscillate, swing, fluctuate, alternate, see-saw, veer, waver, sway, go from one extreme to the other, vary, vacillate, teeter, hover