A Dirty Emma is the act when a man has sex with a girl on her period and then does anal accidentally. While drunk in a truck bed. After the girl pukes her brains out.
I got drunk with my girlfriend last night and did a dirty Emma!
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A Dirty Jack is when a man carves a Jack-o-lantern with its mouth shaped like an O. He fucks the pumpkin this convinces everyone that itรขยยs ectoplasm and not cum.
I did a Dirty Jack with my pumpkin last year.