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1. A saying in England which explains an alternative approach to how to eat your five fruit and veg a day.

2. Taking a cocktail of class A drugs on a one night bender.

3. Going to a gay bar to find orgy partners.
I explained to Ed that his five-a-day could not consist of just grapes, he needed to "Cover the Rainbow" of fruit and vegetables, getting more variety in his diet.

I asked Stu what he did on Saturday, he said he went out to "Cover the Rainbow". He looked tired and his eyes were bloodshot, I'm not sure if he meant hitting up big time or hitting on big boys.
by mrblackdx December 20, 2011
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