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31.
When a man and woman have sex in a pool and the man pulls out at the last second and shoots his "jellyfish" into the water. This can and should be enhanced by being performed at night in a pool with lights making the jellyfish glow. This move can also be performed with gay males, or even a solo male.
1. I came by your house last night to use your pool. I ended up giving your sister a jellyfish.

2. I jellyfished your sister.
by Captain J. Sizzle April 26, 2011
1 2
 
1.
A man that gets emotionally and mentally dominated by a girl. He is left empty and pathetic, like the common jellyfish.
"Hey, Jason's girl cheated on him and now he's acting like a complete retard saying he has nothing to live for, he's become a real jellyfish."
by Noah Vanderhoof June 06, 2006
254 86
 
2.
wet cum. When semen gets in water such as in a hot tub it becomes hard and looks like a jellyfish.
I jacked in the shower and left a jellyfish sitting in the drain.
by libraryguy July 28, 2009
149 58
 
3.
A kind of faux five when you're going in to give someone a high five but quickly pull away, making your hand make jellyfish motions in the air while saying, "JELLYFISH!"
To add to the affect, apologize, then go in for a hug.
When they go in for the hug also, pull back and make the jellyfish motions with your arms while saying, "JELLYFISH!"

Known to be annoying as hell.
Kaitie: OMG! Highfive!
Courtiney: JELLYFISH!
Kaitie: ))):
by ROFLMAOWOTLK November 13, 2008
96 33
 
4.
This is when you take a small trash bag and place it over your partner's head when you're taking her from behind, then you close off the bag around her neck as you pull out of her vagina and go balls deep into her anus, she will expel an enormous amount of air to inflate the trash bag to resemble a Jelly Fish.
Dude, I went so far in her, so fast, she inflated the bag and looked like the Man-a-War Jelly Fish
by Bigdaddy Catalano August 06, 2008
58 31
 
5.
A free-swimming aquatic creature. It starts life as a larva, which attatches itself to a rock or other solid substance and develops into a polyp; eventually the polyp grows into the familiar bell-shaped organism.

Most jellyfish have tentacles and a basic nervous system, though they lack more complicated organs, and they are allegedly composed of about 95% water. They usually catch their prey by brushing potential victims with their poison-spouting, long tentacles, which can be anywhere from inches to several feet long.

Pl. jellyfish

Slang: various sex acts.
Sometimes, during low tide, one sees jellyfish lining the shores.
by tomato-greens January 13, 2006
82 63
 
6.
An adult male who has kept his hair long despite the fact the hair on top is now missing, creating the appearance of a gelatinous marine animal.
That Steely Dan concert was jellyfish city.
by David Bolger February 13, 2009
52 34
 
7.
(n) moving your hand in a jellyfish movement on a man's package while trying to give him a handjob. something most little eighth grade girls do to their older boyfriends, for lack of knowledge how to give a real one.
"Man she jellyfished me again):"

Man 1: "Did you hear what Drew & Kelly did last night?"
Man 2: "Nahh what"
Man 1: "Kelly jellyfished him again"
Man 2: "Damn eighth graders don't know how to give a proper handjob"
by lollipopsinyourmouth March 26, 2009
35 21