One whom has not the milk to fill one's bowl of cereal, thusly substituting beer instead.
Dude 1 : "Man, I'm freaking drunk. And hungry! I'm gonna have some cereal!"

Dude 2 : "... But dude... We're outta milk!"

Dude 1 : "Ah shit dude... WELL... there's beer!! Fuck it! I'll just have some beereal!"
by Adem G April 5, 2012
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Cereal with beer rather than milk. Common darty-pregame breakfast.
I'm ready bro, I started the day with some beereal.
by Fork Manster January 23, 2021
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