Random
Source Code
Random
The act of fisting your sister. Commonly refered to as incest.
Yo this kid named Francis is a fucking sister fister.
a brother or even a sister that likes to casualy fist their sister up the vagina or even the arse hole. Most of the time resulting in a very sore vagina/anus, and if caught resulting in a sentence of 10 years in jouvey.
(here is a role-play of a sister fister and his sister)
Kirsten after a long sleep
Kirsten: o hi there Aaron i didnt see you over there in that dark corner.
Aaron: You dont need to see me, you just need to feel me
Aaron and Kirsten both grin and Kirsten turns around
Anyone who has shoved their hand into a friend's sister's cunt
1) WOW I PULLED THE SISTER FISTER ON STEPH
2) I pulled the sister fister on blakes sister
The act of fisting your sister. Commonly refered to as incest.
Yo this kid named Nicholas O. is a fucking sister fister!!
A bitch you can stick your fist inside of her pussy, no lube necessary. The word sister referring to any random female.
The girl i met last night i was down to fuck, until i realized it was Sister Fister.