shitting the rainbow

After eating food with copious amounts of food coloring, your poo takes on colors other than the usual shades of brown.

To make up or extremely bullshit something so out of this world, that there is only one place one could have received it from and thats a rainbow

Something Sergeant Cid should do.

Someone who has such extraordinary luck that if they were to defecate a beautiful rainbow would come out of their anus rather than faeces.

The third and highest stage of tripping out (usually on shrooms). The three stages include tripping, tripping balls, and shitting rainbows.

The shit rainbow:
Purple: putrid gameplay
Blue: bad music quality
Green; Graphical farts and garlic
yellow; Piss poor keeping the source
Orange: Orange you a fucking idiot
Red: horrible rage educing masochism
-The Angry Video Game Nerd

When a person is in a state of such ecstasy that if they were to defecate, the substance would contain nothing more than a magical beautiful rainbow.