sisexual 

SISexual.

A person who wishes to have sex with their sister. And only her.

Dude, I think he's into incest.
-Yeah, he's sisexual.

sisexual by JoMan112 August 6, 2010

Sisexual 

When a transgender and the regular format of human makes interactions.

My mom and dad I think i'm sisexual.

Sisexual by TransStr8 October 29, 2020

Sisexual 

When one is so drunk that he (or she) will have sex with anyone and anything regardless of gender, race, or age.

He is not bisexual he is sisexual.

Sisexual by infiniteloop91 June 13, 2009

Sisexual 

when a person loves 7 different things like inanament objects that are randomly chosen off the street to get kids made fun of for being so weird and the kids being weird by making out with those inanament objest or just being forced to.

That kid loves boys, girls, plants, pennies ,signs, paper, and plastic.
He's so sisexual when he looks at those items like a lover.
Why is ryan so sisexual when he looks at those plants?
I love those pennies, plants, girls,boys ,papers, signs, and plstic things as much as the other................maybe i should just make out with them.
I'll make that kid make out with that plant becasue it's perfect for him.

Sisexual by Joe septer July 1, 2006

Sisexual 

If you have a sincere and heart-burning love for Simon Morris Lloyd

My friend is sisexual, i’m so proud of him!

Sisexual by DEBBY.LEBBY.LLOY_LLOY May 30, 2022

Sisexual (Si) 

Sisexual: When you like your sex and your opposite but mostly your opposite. It’s like straight mixed with bisexual.

Catherine : I’m Bi but I like guys a little more than girls...
Julie: So your Sisexual (Si)?
Catherine: Yes!

Sisexual (Si) by UrbanGirl2005 April 8, 2018

Simsexual 

Adjective. Being attracted to only Sim characters.

"I am totally in love with Shane, my sim character. I'm so simsexual, haha!"

Simsexual by HelloThereImAPotato October 2, 2016