look up any word, like usuratonkachi:
 
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
 
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
 
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
 
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
 
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
 
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 PBSPinchback February 13, 2009
 
7.
An adjective used to describe anything at all. Seriously, anything. It adapts to any situation, leaving people curious as to the meaning. It is meaningless, which makes it oh so meaningful.

(It's also a gnarls barkley sea creature that stings you and whatnot)
Man, that slut is lookin totally jellyfish! Hell yeah!

I don't know, I felt like the yams were a little too jellyfish this year.


by eed258 January 09, 2009