Top Definition
A form of foreplay in which one gives the male partisipant head while tugging on his pubes (jellyfish tentacles) and licking his sac (the squishy part of the jellyfish)
Mark: Dude, my girlfriend gave me glorious head last night
Rob: Duuuuuude, did she finally agree to give you jellyfish sex?
Mark: Heck yes!
by nOOms March 24, 2011

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