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The act of taking home a sexual partner and entertaining her in the jacuzzi only to find out on the return of your father and his girlfriend that this woman is actually your stepgrandma.
Jesus man, did you hear about dan over christmas? He totally did a bartram.
by Ballamory January 30, 2009
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A person who sleeps with one of thier friends parent or siblings and then sleeps with another part of the family member the following night
Yo that fukin bartram got my mom and my aunt preggers.
by Danielle and Jamie June 08, 2003
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