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usually someone who is very lonely and that is extremely bad at talking to women, they will also try to have sex with anything that gives them the slitest attention
Wow he's such a weird bloke, yeah he's definitely a jack banks
by D.O.4.H September 01, 2016
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An area of the mind used to store images and experiences to be used at a later time to masturbate.
"Brandon put the memory of a girl he saw bending over on the bus into his jack bank"
by Seangrrrr February 07, 2008
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