academic incest

When a college or university hires its own graduates back as professors, especially when they have little to no professional experience in their field.

The academic incest in RISD’s architecture department has led to a decay in faculty quality.

roommate incest

engaging in "bedroom" activities with ones room/housemates.

my roommate invited me to hook up with her and her fuck-buddy! like a threesome!... i do NOT participate in roommate incest thankyouverymuch!!

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Southern Incest

The act of having sweet southern sex with a closely blood related family member. Usually done in the south states of America.

My friend Billy Ray from Alabama is always talking about his southern incest with his cousin..Not sure what that means?

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name incest

When a person dates someone that has the same name of one of there immediate family members.

Do not confuse with name masturbation.

Person H: So what was the name of your girlfriend? Rebeca? The same name of your sister?

Person T: Yea... Still getting use to the name incest...

Person H: Name incest, awkward as fuck.

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passive incest

Passive incest is when boyfriend's and girlfriend's have sex with each others family members..

Dateing a person and haveing sexual contact with someone in their family....passive incest

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diet incest

Being an adopted child of no blood relation to one's adopted parents, the act of having sex with a relative. It has all the flavor of incest without the incest, technically since there is no close biological link between the two (or more) individuals partaking in the act.

Mike: Hey, Nick, did you hear Brian fucked his older sister?

Nick: Awww, gross, dude!? What the fuck?

Mike: I know, but technically they're not related. Brian is adopted; so, it was diet incest.

program incest

Having intimate relations with someone within your college or university program. Often risking a break up and hardships throughout the rest of your post-secondary experience, generally frowned upon especially in smaller program sizes.

Joe: Hey, that girl in our lecture is hot AF.
Greg: No that'd be program incest, you know you never do that.