Top Definition
The predisposition to fantasize about engaging in sexual intercourse with the members of one's own immediate family group. i.e. Father, Daughter, Sister, Brother, Mother, Son. This condition is admonished by the general population but is very much alive in the minds of everyday people. At times (probably more often than not) people do enact these fantasies.
I was having sex with my gf last night and as I was cumming I said "OH MOM" and busted an incestuous load inside her!

I had an incestuous affair with my grandmother she used to give me blow jobs and let me tit fuck her!

My incestuous sister has a great pussy!
by el gabong August 24, 2009
verb. the being of incest
you are an incestuous person
by LI DIK MEEM August 10, 2009

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