A term derived from the movie "Forrest Gump" featuring Tom Hanks. It comes from his memorable phrase of, "I love you Jenny" and has now become a slang term for someone with special needs or mental retardation.
Wow dude you are a real Jenny for not realizing 2+2=4
by Shloup June 19, 2013
High grade ecstasy (MDA) pills or crystals or powder of nearly pure MDA. Crystals are often sky blue, light purle, or white to off white in appearance. May contain MDMA, but is mostly MDA. Other names include matrix ecstasy, sky, and glitch-E.
This is the best Jenny ever! I had the beat roll ever! Awesome desert rave! Sure beats that molly crap.
by CognitiveFuel April 08, 2015
a female donkey
a stallion and a jenny makes a retarded mule.
better breed a jackass and mare for that.
by jesar April 08, 2011
A jenny is the term used to describe a female ass or donkey. Occasionally, a female mule is referred to as a jenny, but more often, the term "molly," "mare" or "mule mare" is used. In western Canada, the term "jennet" is sometimes used instead of "jenny," though the term Jennet usually refers to a type of horse popular in the Middle Ages. One archaic term for a jenny was "she-ass." An intact male donkey is called a "Jack."
My Jenny is very protective of her foal
by TheWiseNinja February 03, 2010
A girl whom you think is really nice to begin with. Then you realise that she doesn't give a damn about you or anyone else, she cares only about herself. While she is loyal to her family, she never thinks about others. She won't tell you her secrets, she is never organised and she's always hanging around with people other than her "best friends" since she doesn't care about any of them. Watch out for these girls. They may appear funny and loyal but they are only in it for themselves.
Jill : Oh have you spoken to the new girl next?
Jane : Oh yeah, she seems like a complete Jenny :/
Jill : Darn, I thought she looked so funny and friendly. . .
by pyjamafish March 11, 2011
Jenny is short for Jenitals or Genitals!!
ICK erin just kicked billy in his Jenny
by toybox scares me May 31, 2009
NOT SHORT FOR JENNIFER. the name you're looking for is 'jenni' for fuck sake.
'hi whats your name?'
'jenny. :)'
'oh as in jennifer?'
'NO FOR FUCK SAKE'

:)
by hiya. :] February 07, 2010
The person you call when you realize you need to start losing weight
"Have you called Jenny yet?"
by DonkeyRiver April 03, 2008

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