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1.
A fine dust rendered from pulverized cereal at the bottom of the box. The dust is usually the kif of the cereal box with all of its sugary goodness. Usually one is blessed with this treat when the other members of the household have damn near eaten all the cereal.
Honey there is no more Frosted Flakes! That’s OK sweetheart, I just snort the cereal dust from the bottom of the box.
af H.R. Manager 30. august 2009
 
2.
the dust in the cereal box that goes into your bowl when all the cereal is gone.
FUCK. all i got was cereal dust because dave finished all the goddamn cocoa puffs.
af jayveeeeee 5. oktober 2008
 
3.
The tiny crumbs of cereal that have collected at the bottom of the bag. A person unfortunate enough to be pouring the last bowl of cereal a bag can handle, will encounter this.
God damn cereal dust! X(
af Jaykub F 10. juni 2009