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1. Jeans worn by slim guys which were originally marketed to girls. Such jeans are slim fit, low rise, have few decorations, and reach closely between the legs. Often: jeans are black, have a 5th pocket, and, for crotch comfort, are flexible (e.g. from 5% Lycra).

2. Jeans sold in the girl's department; junior jeans
What a fashion violation -- that fat kid is wearing girl jeans with flowers on the pockets!
by Ryen Salinger April 03, 2007
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A girl that's not your girlfriend yet but that you have sex with and love.
Guy: will you be my girlfriend?
Girl: no...that freaks me out...can I he your Girljean instead?
Guy: sure!
by Markjean May 26, 2016
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