A weak and scared man with no heart or a brain who acts like a tough guy. However, they are clearly see through and you can see through their bullshit and weak ass act they're putting on.
Hey Henry, stop acting like you're a wise guy. You're a jellyfish, I could see straight through your lying ass.
by Lorenzo The Great July 16, 2021
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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.
by Monster-Punk-Barbie December 25, 2015
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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.
by Mrs.Morphine December 19, 2008
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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"
by Flabtastic March 22, 2012
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(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
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To go in for a fist touch, but stopping midway, yelling "JELLYFISH!" and propell your hand backward like that of the movement of a jellyfish.

Other variations of this would be snowman, in which you place your fists ontop and bottom of the other persons fists, snail, in which you slide your hand onder theres with two fingers up, and turkey, where, during a high five, you but your thumb out and slam your fist into their palm so that it resembles a turkey.
FIST TOUCH! *goes in* *Stops* NOPE! JELLYFISH! *goes backwards*
by Gremlin1992 March 25, 2010
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A bodily fluid found in a woman's underpants with a consistency very much like a jellyfish.
"Girl, I think i just started my period..i better go check it out"..girl returns.."False alarm, it was just a jellyfish faking me out."
by Pirate Niki July 11, 2008
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