Mr. Sister Fister

Mr. Sister Fister is a middle aged man who puts his finger his sister’s vagina

That man looks like/is a Mr. Sister Fister

by Hepatitis A January 29, 2018

ur sister fister

Stronged then any of the ur mom gay insults

Person 1 : ur mom gay

Person 2 : ur dad lesbian

Person 3 : Ur granny Tranny

You : ur sister fister

*world melts and universe explodes*

by Zygno April 4, 2018

Sister fister resister

Someone who is against pewdiepies "sister fister"

"The sister fister resister club is protesting for it to be the 'brister fister'"

by Save.meeee.boii August 21, 2017

fister sister

1. a female who likes to engage in the ancient art of fisting with other women.

2. the act of fisting your female sibling.

3. an order of nuns devoted to fisting

1. watch out for that chick, i hear she's a fister sister

2. A: i often like to fister sister
B: you mean, fist a sister?
A: same thing dickhead

3. she is a sister of the fister religion.

by 60 2nd squire January 5, 2009

Sister Fister the mister kisser

Your dad

My dad is a sister Fister the mister kisser

by JOHN INTERNET GOOD December 17, 2021

sister fister

when you have incestuous thought and want to fuck your sister

kristian:i want to be a sister fister
kevin: dude no

by short rich man shut up kevin May 28, 2021

ur sister fister

worse than ur mom gay and ur dad lesbian and worse than ur granny tranny combined

trevor: yo kyle ur granny tranny
kyle: ur dad lesbian

trevor: no u
kyle: ur sister fister
trevor: *dies instantly sun breaks a piece of*

by lolfagit 101 March 20, 2018