yo-yo

☆ yo-yo [yō′yō΄ ]

n.

pl. yo-yos [< ?: the toy came to the U.S. from the Philippines]

1. a spool-like toy attached to one end of a string upon which it may be made to spin up and down

2. Slang a person regarded as stupid, ineffectual, inept, eccentric, etc.

adj.

Informal up-and-down; fluctuating; variable

vi.

yo-yoed, yo-yoing

Informal to move up and down; fluctuate; vary