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15.
Used in the phrase when a girl says to a guy while having intercourse and the ship has already been sailed
(dick-out-o'-me)
"Hurry up and get your dichotomy, I have an appointment in like 5 minutes!"
by Bob Faggot November 26, 2007
 
16.
The cutting off of one's penis while sleeping by an enraged spouse.
The police stated that Mrs. Bobbit performed the dichotomy without a hitch!
by ouch August 25, 2003