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1.
A Jellyfish high five is a type of high five fake out.

When an high five is initiated, right before contact, one of the participants in said high five pulls away wiggling their fingers or arms and says "Jellyfish"
*highfive* ~~~~~ JELLYFISH
*highfive* ~~~ smaller jellyfish
(jellyfish High Five)
by 4ShytsNGiggles December 28, 2013