The discovery that your ancestry actually consists of a family tree that goes straight down.
"It may sound stereotypical, but there really are some people who have an Incestry instead of an ancestry."
by Legendary Pusshole October 21, 2009
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Look at the incestry of my generations, they all have blue eyes!
by my ex-boyfriend June 24, 2020
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Sometimes, "hicks" will mispronounce the word ancestry by throwing in a country twang with a subtle, yet accurate family history of inbreeding.

Arguably a Freudian slip.
Stephen: Hello. Nice to meet you. I am Stephen Harding, a Navy veteran.
Darrell: Mah great uncle was Civil War vetrun. Yeah, he's parta mah incestry.
by Shareeb4Prez April 10, 2009
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The act of having sexual intercourse with one's ancestors.
In the movie 'The Whale rider' the main character gets really into Incestry after we found out that she literally rode a whale.
by The Anal Crew November 1, 2015
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when 2 or more family members indulge in sexual activities.
A pregnant person who nags is usually the result of being raped by her incestrious grandfather.
by rjfnsdk June 27, 2011
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John: "Your mom gay"
Bill: "No you"
John: "Your family tree LGBT"
Bill: "Your ancestry incestry"
Entire world collapses on itself after John took the most intense insult known to man.
by ScruffyNuffy March 31, 2018
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No living mortal can survive after this insult, so it is seldom use amongst the commonfolk
Johnson: "you're mom gay
Alex:"ur ancestry incestry"
*instantly banished to the deepest pits of hell, to never recover*
by You're family tree LGBT March 24, 2018
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