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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A rare toy from 1987. It was Very technologically advanced for its time. The doll was made by playmates. Look it up!
by lego adam November 09, 2016
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A girl from a nursery rhyme....therefore, a great singer and acter who is beatutiful but spends her time bringing buckets of well water down a hill with a boy named Jack.
Guy 1: Look at that beautiful girl on that hill with Jack.
Guy 2: She must be a Jill.
by Awesomechick529 July 28, 2011
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the act of letting your hair down, dancing your a$$ off, and generally having a fantastic time.
Ex: I got Jilled last night.
by jj1971 February 10, 2012
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