Someone so massive that they're virtually unable to move by themselves. Also, they tend to rarely talk about anything but food. Generic tagline, as opposed to "Braaaaaaains" is "I'm...just...so...*wheeze*...hungry".

They may be placated with an offering of a sheet cake, hence deriving their name.
"Jesus Christ, dude! Cake Zombies!"
"Throw a sheet cake and grab your walkin' shoes, they'll never catch us."
by ohnoesitsthesurge June 25, 2008
Get the cake zombie mug.