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1.
something that is pretty much amazing.
my bf tommy is rainbowlicious and I love him.
by cassie leferve November 19, 2006
 
2.
A deliciousness of colours ~ an array of beauty so good you can feel it, taste it, as hues across the spectrum of light alight you.
That dress you are wearing is rainbowlicious.
by psychefiddler April 30, 2013