1. A pirate who menacingly sneaks through walmart at night messing up all of the cereal boxes, changing their order, and damaging packaging; resulting in the constant disarray that is the walmart cereal aisle.

2. A person who is quite rude and possibly improper, with little intelligence.
1. Those cereal pirates dented this box of Cocoa Puffs!
2. Man, she's such a cereal pirate. I can't believe she farted in front of your parents.
by argh! April 12, 2006
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