Used in the phrase when a girl says to a guy while having intercourse and the ship has already been sailed
"Hurry up and get your dichotomy, I have an appointment in like 5 minutes!"
by Bob Faggot November 26, 2007
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