Dichotomy

[Sarah]

A split into two parts. In biology, used to describe physical splits. In social life, used to describe differing points of view or action.

[Sarah]

where you compare two things that normally don't go together

[Sarah]

Division into two usually contradictory parts or opinions.
Astronomy. The phase of the moon, Mercury, or Venus when half of the disk is illuminated.
Botany. Branching characterized by successive forking into two approximately equal divisions.

[Sarah]

what you need after having unprotected sex with an extremely slutty girl

[Sarah]

the comparison of two groups that usually appear to contridict each other

[Sarah]

a scenerio that is divided into two mutually exclusive or contradictory parts

[Sarah]

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)

[Sarah]

being twofold; a classification into two opposed parts or subclasses

the study of lesbians

[Sarah]

A division, usually into to opposite parts.

To take something and split it into two opposite parts.

[Lanell]

The [cutting off] of ones penis while sleeping by an [enraged] [spouse].