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The female version of wank bank - A conscious thought by females to mentally photograph a person so as to be able to masturbate or jill off while thinking about them at a later date. Jill off is the female version of jack off: unassisted autoerotic stimulation.
"That dude is seriously hot!"

"Yeah, I might put him in the jill till"
by Leigh-Ann Mol / Melissa Attree February 18, 2009
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