a substitute phrase for 'are you serious?', whch can be modified in a number of ways, eg 'are you for cereal?' (are you for real?)
Johnny: I just saw Britney Spears walking down the street
Kate: Are you cereal?
by katattack November 13, 2007
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Used to be what the cool kids said in school, but then the nerds took it over. Meaning: Are you serious??
Cool kid: eh mah gawd I saw an adorable guy yesterday in the hall way!!

Nerd: Are you cereal??!

Cool Kid: Don't try to be cool, k?
by Bailsmh January 9, 2009
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Are u super cereal is a popular YouTube channel that gets millions of views! The channel is ran by Sean, Mike, and Steven. Aka Cereal, Best in Class, and Daitrickster. They usually use elmo and kermit the frog toys for entertainment
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It means new episodes of Steven Universe and Uncle Grandpa.
Uncle Grandpa: Are you guys for cereal right now?
Narrator: Are we ever!
Steven: What does that even mean?
Narrator: It means new episodes of Steven Universe and Uncle Grandpa. Starts Saturday, the 7th of January at 8AM on Cartoon Network.
by Kevin the Dork Slayer January 23, 2017
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Every year, May 13 is a happy day for people who put milk in a bowl first and then cereal. On this day U CAN NOT get mad because of that because we celebrate National put milk in a bowl before u put the cereal day.
Anna: *puts milk in a bowl before cereal"
Mom: WHAT THE- R U DOING?
Anna: Chill, it is National put milk in a bowl before you put the cereal day.

Mom: I-
by Dahoodgrill123 November 4, 2021
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