When someone eats cereal for breakfast, lunch, and dinner.
Person 1: Dude buy yourself a sandwich your becoming a cereal killer

Person 2: SHUTTUP IM BEAUTIFUL *MUNCH MUNCH MUNCH*
by triple anal rape January 17, 2014
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Synonym of Cereal Murderer.

Anyone who committed mutany towards Cap'n Crunch, snare-trapped the Trix Rabbit, killed the Lucky Charms Dwarf, and made chicken soup out of Cornelius the Rooster.

In addition, the one that infected the Alpha-Bits computer mascot with the installation of Windows XP and subsequently died of worms and viruses.
Danno's a cereal killer wanted by the FBI (Federal Bureau of Idiots).
by Damn Damn Danno October 7, 2005
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One who consumes a lot of cereal.
Divorce lawyer: Well, you're really screwed now. Looks like your wife is going to take everything, and you're going to be stuck with a lot of alimony payments. If I wasn't such a shitty lawyer, you would probably be ok...but I'm a shitty lawyer, so you're really screwed. After you pay my fees you might not have enough money to eat. Oh well, I'm a shitty lawyer and I really don't care about you, or anything else for that matter.
Ted Bundy: Huh. Didn't see that coming. Guess I'll become a cereal killer.
by mrm5593 September 27, 2006
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1.one who kills cereals

2.another name for Montana
1. Oh no! My Cocoa Pebbles are dead! Must've been a cereal killer!

2.Where do you live young man?
Why I live in Billings, cereal killer.
by fishrocker April 8, 2009
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Someone who loves cereal so much they don't even wait for it to come out of the box before they gobble it up and don't let anybody else have any.
You tell Johnny the next time he comes over here after school he better not act like no cereal killer.

This kitchen looks like it has been hit by a cereal killer.

Wipe you mouth an stop actin' like you wuz da top ramkin' cereal killer.
by Pat Eberhart June 14, 2006
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