Top Definition
Another name for a cloth diaper one holds for an extended period of time (similar to a blankie).
"Man, I kept my oy yoy while I was sucking my thumb until I was like... eight years old."
by singularapathy February 06, 2010

Free Daily Email

Type your email address below to get our free Urban Word of the Day every morning!

Emails are sent from daily@urbandictionary.com. We'll never spam you.

×