Top Definition
The immense feeling of joy felt when looking at or witnessing something that is adorable beyond explanation. If a high level of cuteplosion is maintained, spontaneous cutebustion may occur. It is almost always fatal.
Dude, I just saw a kitten dressed in a mini tuxedo skip through a field of dandelions. Seriously had to take cover in fear of a cuteplosion.
by Mitchepie March 28, 2013

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