A Dirty Jim is when you stick your cock in a 50 year old womans ass without vaseline and pull her hair back so she can't fight it.
I went to Boppers and picked up an old woman and gave her a dirty jim.
by Von Dutch August 22, 2006
a sex act in which a man or woman licks the toe cheese from between the toes of his or her partner
His breath smelled like shit and vomit because he spent the weekend doing dirty Jims for his girlfriend.
by footfetish101 August 20, 2009