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!
Rob: Duuuuuude, did she finally agree to give you jellyfish sex?
Mark: Heck yes!
by nOOms April 10, 2011

Bro 1: hey dude how’d it go with that hottie last night?
Bro 2: Nothing major just some jellyfish sex and titty fuck.
Bro 2: Nothing major just some jellyfish sex and titty fuck.
by Edenjayy September 25, 2021

"Jellyfish sex horse salt Vs. starburst in the coffee machine." "Sorry guys, my brain doesn't feel good." - Soup from the Goons
by The Ultimate Gooner August 31, 2025
