An object in the sky that gives the opposite emotional reaction as rainbows; usually ominous, dark, stormy clouds.
Somewhere under the painbow is a really shitty storm.
by sbamk August 14, 2009
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It's like a rainbow but looking at it turns you inside out.
They say seeing a painbow will be the most agonizing moment of your life until you die 8 seconds later.
by The BooBoo Buddy Club November 12, 2021
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Used to describe something as memorable as a double rainbow.
Except it's painful.
I went sledding and face planted in the ice. Double Painbows the rest of the way down.
by KiriSpork January 3, 2011
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