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1.
the act, or product of moving bowls.

to "bake" toilet cake is to take a dump.
"i'm going to bake some toilet cake."

by L-sos November 13, 2007
 
2.
Any baked treat eaten within the confines of a bathroom.

This can include cake, pie, cookies, eclairs, donuts or any other sweet treat. There is a deep shame associated with eating toilet cake.
"Can't believe you caught Bill eating toilet cake."

"I know, bro. Why in the world would someone eat devils food cake in the shitter?"
by Dr. Victor Von Doom April 04, 2013