sisfur

What you would call a female kitty instead of sister

Lindy is going to be a great big sisfur.

sisfur by Lilsavage15 September 19, 2019

sisturd 

your little sister who always gives you shit. Being the the older sibling gives you the authority to call her a turd.

My sisturd was bitching to me all night, so i threw her cat out the window.

sisturd by t3pf May 26, 2009

sisturd 

Nickname for your sister when she's acting like a turd.

Sisturd, don't be peeved because I called you out for not contributing your fair share for Mom and Dad's birthday gifts. It's not my fault you smoke all your money.

sisturd by becsmoneybooty August 11, 2008

Sisfuck 

The sordid act of sodomising one's own sister.

Mendes likes a sisfuck every now and again.

Sisfuck by Roger Jackson March 22, 2003

sisturkey 

The female version of "broham".

Nathan Marcus Christie is my sisturkey!

sisturkey by hayleyy & nathannnnn! October 21, 2007

Sinfuriating 

A typo that spawned a brand new and awesome word. Something is considered sinfuriating when you want to do something sinful, but circumstances don't allow you to accomplish the act. Not being able to do the sinful deed then infuriates you, causing sinfuriation.

God I wish we could have sex right now! It's so sinfuriating that I don't have a car!

Not being able to rob the bank because you left the fucking guns at home is so sinfuriating!

I want to kill my grandmother for her inheritance. It is so SINFURIATING that she locked herself in her room!

Sinfuriating by Rosie O'Connell December 19, 2008

sisfrausin

A mixture of sister, friend, aunt, or a cousin. This term is commonly used as the shortened version: "Sis". The male version is Brofunsin, a mixture of a brother, a friend, an uncle, and a cousin.

-Hey, Sisfrausin, this definition is pretty nice!

-Should we like it?
-Definitely!
(I'm sorry about that)

sisfrausin by EthnLex June 29, 2018