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sister fister

The act of fisting your sister. Commonly refered to as incest.
Yo this kid named Francis is a fucking sister fister.
sister fister by Quay and Justin October 29, 2003

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
sister fister by mitch aka titch September 2, 2008

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
Mr. Sister Fister by Hepatitis A January 29, 2018

sister fister

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
sister fister by Zane April 4, 2003

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*
ur sister fister by Zygno April 4, 2018

sister fister

The act of fisting your sister. Commonly refered to as incest.
Yo this kid named Nicholas O. is a fucking sister fister!!
sister fister by Dankolas O. January 25, 2016
More from Urban Dictionary

piddlefart

verb. To waste time doing nothing.
Instead of doing my homework, I decided to piddlefart around for two hours.
piddlefart by Rene April 25, 2005
Word of the Day on October 9, 2026
anyone who succeeds in disgracing/over indulging themselves in the throws of clubland
28 hours and 4 clubs later, gurning for england but still refusing to go home - a total wrongun!!
wrongun by bevvers March 21, 2007
Word of the Day on October 8, 2026

square grouper

Nickname given to bales of marijuana thrown overboard or out of airplanes. Origin is reportedly from members of the US Coast Guard in the area of Southern Florida.
"Base we've got some square groupers floating outside of Miami harbor."
square grouper by slipsheet November 6, 2004
Word of the Day on October 7, 2026
A girl who does ballet and only talks about ballet. Her schedule is filled with dance classes which does not allow her to do any other activity.
"Hey, do you know that girl Sally?"

"Yeah, she's kind of annoying. All she ever talks about it ballet."

"Wow, what a Bunhead."

"Hey Sally, you want to hang out this weekend?"
"I can't, I have dance."
"You're such a Bunhead."

"Yeah... I know."
Bunhead by Jen00 October 24, 2014
Word of the Day on October 6, 2026

trucker's tan 

A sunburn or suntan focused on the left arm. It is caused by the left side of the body being the only half that gets exposed to sunlight while driving. Presumably, it would be located on the right side of the body in countries where they drive on the left side of the road.
I had a trucker's tan after driving for 10 straight hours on a sunny day.
Word of the Day on October 5, 2026
The phenomenon where adults salivate at children's toys
Every time I walk into the toy aisle, I catch myself kidulting over the latest action figures and LEGO sets!
kidulting by Emotional Cruiser October 12, 2025
Word of the Day on October 4, 2026
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