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Jellyfish 

When someone takes on another's feelings for a third person, especially dislike.
Person 1: That girl didn't like me, and now she's making others dislike me as well.
Person 2: They're all jellyfish.

jellyfish 

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.
jellyfish by tomato-greens January 15, 2006

jellyfish 

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.
jellyfish by eed258 January 9, 2009

Jellyfish 

When a person puts a hand in for a high five, but just before the kill, the giver of the high five wriggles their hand away, and annoyingly shouts "jellyfish!"
Jill went to high five Matt as congratulations, then she Jellyfished him.
Jellyfish by Mrs.Morphine December 22, 2008

jellyfish 

N., a statement that sounds like a compliment but, the more you think about it, the more it stings like an insult. So named because, like a jellyfish, you don't feel it at first, but the longer you leave it on, the more it stings.
Chick #1: She was like, "You actually look nice today," and I was like, "Thanks." But then I'm like, what the fuck was the purpose of "actually"? Was she saying I don't usually look nice?
Chick #2: She said a total jellyfish to you, bitch.
jellyfish by nappy pappy April 27, 2008

Jellyfish 

Forget the word jealous, this is a new level of abbreviation.
"Oh my god i am so totally Jellyfish of that girls new Prada, its to die for"

"jesus mate did you see the way she was lookin' at that girl all over you, she was totally Jellyfish, respect"
Jellyfish by Flabtastic August 7, 2012