8
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
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9
Stuff you say "woah, that's sexy" to.
Woah, that twincest is sexy.
by Kat-chan February 01, 2008
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10
Tom and Bill Kaulitz (Tokio Hotel) have twincest time on the tour bus every night.
by anonymous twc fan October 23, 2008
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11
lucy and anna were twins but they regularly ate eachother out. this is called twincest
by anonimus 1/\ November 07, 2007
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12
Slash (mainly) between twins.
1. Elladan and Elrohir, twin sons of Elrond of Imladris. From lotr
2. Weasley twins from HP
by brat July 03, 2004
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13
A form of incest between twins. Twins having sexual relations.
There is often fanfic involving twins such as Fred and George Weasley having sex.

"I just read this really odd fanfiction that involved a lot of twincest!"
by epsilina August 01, 2007
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14
The act of Incest between twins.
"I can't believe those twins are snogging! That is blatant twincest"
by Joey Masters December 07, 2007
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