verb: to Roy G. Biv. To consume 7 shots, each of which corresponds to a different colors of the rainbow. Once you have consumed all 7 shots of the rainbow you have effectively been Roy G. Biv-ed. You may Roy G. Biv multiple times in one night. Usually ends in death or in "roofie-ing oneself"
An abreviation for the visible light spectrum, namely red, orange, yellow, green, blue, indigo, and violet.
In laymans terms, the colors of the rainbow.
"A good way to remember the sequence for visible light is roy g biv"