This is the opposite of the male "jacking off", a girl masturbating can be referred to as Jilling On.
Jon: "Dude I just caught some girl jilling on in the bathroom!"
Brian:"Wow I love co-ed bathrooms!"
Robcat:"Did she really Jill On? thats hilarious!"
by B-dizzle and J Bird April 22, 2010
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wow, look at that jill who just pulled over by the cops, man
by jill, duh October 26, 2006
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jill comes from greek word amazing. most amazing girlfriend ever. also has the best personailty and can put up with her boyfriend
N. - means to be amazing at everything
i wish i could be a jill at life.
by kingscuba23 April 8, 2009
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a sexxy ass girl that everyone lovess :)
jill is so hotttttt.
by CABAYUM July 11, 2008
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the "girl" a guy is taking home to have sex with.

this girl is really his hand, that he is going home to masterbate with. hold it up and the fingers spell out J-i-l-l.

makes him sound cool, even though everyone knows he's pathetic and can't get any.
guy1: "me and my girl had so much sex last night"
guy2: "yeah me too, i met this fucking hot chick named Jill."
by asfhhj June 22, 2006
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1. IDK, my BFF?
2. One who is constantly being sent text messages by 12-year-olds.
"Who could you be texting that much?"
"IDK, my BFF Jill?"
by Lex B-S December 16, 2007
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