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plain and simple: when two chicks rub their pussies together by straddling one another. very pleasureable.
I know Mindy and Angela were donut bumpin' that bed was soaked.
by KroSS September 23, 2004
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My gross pervert friend Daniel told me it was when one girl strattled another girl and the grinded their pussies against each other or something. Kind of like dry sex, only not so dry! Yucky huh?
"You look totally flushed...you were SOOO donut bumpin' all night!"
by Anonymous April 30, 2003
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