When, due to a lack of extra females, one female purchases a set of different color lipstick and proceeds to give a male driver a blowjob, applying a new color every few minutes until the driver's penis looks like a gay pride flag.
"Hey honey, why don't you pick up four extra colors of lipstick while you're in CVS, and then you can give me a road rainbow on the way to church."
by pariotto August 16, 2009
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when a pregnant girlfriend fulfills the sexual desires of her boyfriend by letting him face fuck her but she ends up puking on his cock because she ate too much rocky road ice cream.
Dude, my girlfriend performed a rocky road rainbow on me last night in the dark and I kind of liked it.
by Lando Mack September 19, 2015
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1: A colorful, challenging course finalizing the Special Cup in the Nintendo Mario Kart game series.
2: An annoyance.
3: The bane of one's existence.
"SHIT FUCK, GODDAMN YOU RAINBOW ROAD!"
(Often used during game play, after falling off course 4 times in a row.)

or

"I can't believe that stupid asshole picked Rainbow Road again."
(Often used during WFC Wii Online play)
by HollyMarieP May 16, 2008
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That one road on MarioKart that is impossible to complete because people push you off, you fall in the holes, a blue turtle shell is thrown at you, and other stuff. You get last like every time, and there's always that one friend that likes it. That friend is an idiot. The only way you can actually progress is if you get a bullet bill because you're in last. That Lakitu guy always has to pick you up and depending on which version of MarioKart you are playing, he takes 3 coins away. He's a jerk. You were already in last and now he takes the coins that make you go faster, and he takes his time picking you up because he probably finds amusement in it. Lakitu has no friends. Also, it's that road where getting Star Power sucks. Now you're going TOO fast and you die. You always try to jump the holes with your mushroom. But you can't. Because your fellow competitors are massive jerks and make you fail. If you're playing Grand Prix, this is the road that will make sure you don't win. If you manage to succeed in first place, tweet it at me. @MiguelAnimates. I won't get any, though. Because you will fail. Like always.
Rainbow Road Sucks!
by Xion X May 21, 2017
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The afterlife. Once a person dies, they are sent to race on the Rainbow Road with Peach, Mario and the Toad.
It's called a road, it's called a Rainbow Road. It is a road that you go. It's a road that you go, when you die.
by poudink November 25, 2020
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When you have a bowl movement and a flurry of fruity pebbles lands on the ground beneath you.
Kid 1: "I had a rainbow road in the middle of class when my teacher wouldn't let me go to the bathroom."

Kid 2: "Damn dude that sucks."
by GEArSofWAr873 July 25, 2010
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When 2 or more girls (preferably more), each with a different color of lipstick, compete to see who can get their lipstick the lowest down on your dick
"Dude! The other day Sarah and her friends gave me a Rainbow Road, Jessica came first with purple"
by kcbxo April 16, 2014
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