Top Definition
To be so excited about something you almost shoot the gayest thing in the world out of your butt. Similar to pooping kittens.
I saw the cutest little puppy earlier and it made me shoot off several rainbow farts.
by plaidtattoo February 10, 2009
2 more definitions
One of the best gamer tags out there.
Hey RainbowFart watch out for the sniper in the cave
by RainbowFart September 06, 2010
Rainbow Farts happen when you end up eating too much colorful food like skittles and M&Ms to the point where you shit out farts that are rainbows.
*Jacob munches on some M&Ms*
Jacob: *FARTS*
Jacob: OMG OMG OMG I JUST HAD A RAINBOW FART
by Khagreytits September 07, 2014

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