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 We'll never spam you.