sistersister 

really cool actrises

twins

sistersister by joanna July 2, 2003

sistersister 

when two girls say the same thing at the very same moment.

person 1:person2:"god"

sistersister by xtyne February 6, 2003

sistersister 

tamera mowry

who is tamera mowrys charater

sistersister by amber March 26, 2003

sistersister 

a person who has a different personality but can look alike

same smile, attitude talk the same

sistersister by manisha tatum June 10, 2003

Dr.sisterfister 

The man, the pope, the doc, the absolute gamer, a madlad thats has 3 monitors and a bunch of stash of anime girls, what a guy, yeah, oh but I have to warn you that he sometimes will ra-

and someone ship him with audiction, idk who, and idk when but...yes its real

Person 1: do you remember his name?, that youtuber I saw earlier in the streets?

Person 2: oh, the one that carries 2 anime body pillow?

Person 1: yea

Person 2: his name is Dr.sisterfister

Person 1: oh thanks

Dr.sisterfister by Proxley the serwofun caretaker April 13, 2020

sisterfister 

Strictly, one who indulges in a particular form of incest, using only their hand (see fister. Often used as a term of contempt, and shortened to "sissy" on account of their unadventurousness.

See also brotherfucker.

Your brother's such a sisterfister, you know.

sisterfister by Lucifer B September 20, 2005

Sisterfister 

Adjective meaning an alternative, clean version to Mother Fucker

*joey smacking Sarah on the butt
Sarah - "Ouch you sisterfister"

Sisterfister by Hink68PMMF October 25, 2017