Top Definition
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 20, 2009
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 09, 2009
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 January 01, 2016
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