When twins get together in a odd and disturbingly immoral relationship to the out side world. A mix of incest and twins.
Laurie: damn you see those blonde twins over there, they are having a twincestual relationship
Josh: that is gross, and not to mention immorally disturbing.
Laurie: damn straight it is,andi thought the girl was hot.
Josh: obviously so did her brother.
Laurie: just like those gay scots the proclaimers.
Josh: lool
by Chizeej- on behalf of Lozz April 17, 2007
twins having sex.. its so wrong, yet it feels so right
me and my twin have twincest. i fuck my twin, and enjoy it.
by nadia_aidian February 28, 2004
When twins are in lust/love with eachother.
by Anonymous September 14, 2003
When Twins are in love with one another and/ or like to perform sexuall activities together.
Benji and Joel are in alot of Twincest fics.
by Rhiannon December 08, 2003
the hottest damn thing ever!
In The anime/manga series Ouran High School Host Club the Hitachiin twins(Kaoru and Hikaru) were called out on there twincest by Kirimi Nekozawa.
by sourxneonxgummixworms June 14, 2009
incest between twins.
twins who have a sexual relationship
Benji madden + joel madden = yummy twincest
by squee February 19, 2005
Incest between twins. In the world of fanfiction, this is both a frequent and yummy occurance that we, as human beings, should be eternally grateful for. <3
Hizashi/Hiashi is mad twincest. <3
by Louey March 23, 2007
Twincest
Gives new meaning to fo fuck yourself.
TWINCEST example: Hikaru Hitachiin and Kaoru Hitachiin
(if you dont know who they are, LOOK THEM UP)
by ASIAN >.< Wu-Dawgg May 07, 2010

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