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Really fast sex. Usually done in 10 minutes or less.
*in restaurant~"Hey babe, while waiting for our food to come wanna go to the bathrooms and have some Jam Sex?"
by Raymond & Jay Rod September 22, 2007
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2
Sex with a girl while she's on her period.
Her: I'm on my period but really horny, want to have jam sex?
Cool partner: Sure.

Her: I'm on my period but really horny, want to have jam sex?
Uncool partner: Ew, gross.
by baileysinashoe January 16, 2017
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