Sislerfister 

When you have a hot glove and fist and girl/guy

That guy is a bad sislerfister its not hot enough.

Sislerfister by Rat exterminator_koltonratface May 14, 2017

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

Sisterfister 

its the female of rare species called brofister, it was discovered in youtupia jungles at 2017 by the famous scientist felix kelberg pergananet

and always sisterfister!!!!

Sisterfister by RoloxX September 2, 2017

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