Top Definition
The old cheese sauce found inside macaroni and cheese boxes with an expiration date that has long passed.
That oldaroni is a different color and it stinks because it is so old.
by amazing JavaScript programmer January 16, 2009
5 Words related to oldaroni

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.

×