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(verb) (1)To insert the male reproductive organ into the female reproductive system.
(2) To fill the female reproductive cavity with the juices from the loins of the male reproductive organ.
Guy 1: How was your date last night?
Guy 2: It was fine.
Guy 1: Did you fill box?
Guy 2: Yes I stuck my penis insider her vagina.
by BSU Beaver February 05, 2009