Top Definition
Somewhere between crust and fluff. Perhaps something nasty in your belly button.
I think I have a problem! I stuck my finger in my belly button and pulled out some flust.
by Toshibi January 03, 2006
The powdery residue at the bottom of a cereal bag. It's flakey and dusty.
The only thing that can ruin my cereal is the flust.
by Sstephen September 22, 2015

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.

×