A rainbow lacking in color and presented in greyscale.
When displayed it can take on a few meanings:
1. An open statement of one's heterosexuality.
2. Having Anti-Homosexual sentiment.
3. A fan of the Metal genre of music.
4. In protest against the use of the rainbow as a homosexual symbol.
5. Replacement for non-homosexual emblems, labels, signs or etc. that feature a colored rainbow, as to avoid confusion.
A combination of douche, asshole, and jerk. When a male person has the qualities of all three, and no other title will describe him. They are colorful in every shade of black and grey. Along with some other undefined colors and random objects, stuck inside their own personal rainbow.
Girl 1: Idek how to describe him. I would say he's a jerk, with a dash of douche, and maybe an even tinier bit of asshole?
Girl 2: Haha, a douchasserk rainbow.
When a woman wears different shades of lipstick and a man blows a load on her mouth causing the lipstick to run!
Mary was so horny that she put on every shade of lipstick she had. She called Johnny over and he gave her a soggy rainbow. Mary looked like a sad clown!
Blood rainbows are rainbows that form out of human hatred and dread. They have the appearance of a rainbow at first, but the closer you get, the redder it gets, until it looks like pure blood. Unlike most rainbows, there are ends to these, but at the end of them, there are Death Unicorn dens, and if you get anywhere near those, there is no chance that you'll survive. I implore you not to do it.
"Hey, dude, is it normal for your eyes to be bleeding like that?"
"Oh, absolutely not! I just happened to look at a bloodrainbow :)"
"Oh, okay, you're never going to be able to see again! :)"
"So I put the row subtotals in pink on a blue background, these column subtotals in orange on a black background, put the totals in tangerine on a teal background and highlighted the negative values in fuchsia. This should make it really clear to understand. What is your problem?"