Top Definition
The act of self masturbation by either a male or female.

Auto: Self
Coitus: Sex

We all know it's physically impossible to have sex with yourself, therefore the act closest to sex with yourself is masturbation... aka: Autocoitus.
Until being caught by her mother, after breaking up with her boyfriend, Jessica spent her weekends alone having autocoitus.
by SmokeyBear November 25, 2013
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