Sisterface 

an endearment said to a sister who you aren't very close to, but pretend you are. Whose your relationship is mostly based off infrequent long distance phone calls and interactions. Mostly you keep in touch over facebook. Pretty much not being a person anymore just a face. Hence Sister-Face

Sister 1: Hey sisterface, I saw heard good charlotte pop up on pandora made me think of you, miss you!

Sister 2: Aweee miss you too sisterface! Hope everything is going good!

*Thinking wow haven't listened to good charlotte since I was like 14 I'm 20 now, nice how much she pays attention*

Sisterface by Melly92 December 24, 2012

Sistermance 

The female equivalent of bromance. Love and affection shared by two straight females.

Not to be confused with shoujo-ai, yuri, or femslash.

Jamie: "Have you seen Firefly? Kaylee and Inara have the cutest sistermance."
Sam: "Agreed! Mal and Wash's bromance is awesome, too."

Sistermance by Skydive Off Isengard August 11, 2014

Sisterfriend

A sister friend is when you have one sister that also doubles as your best friend.

My sisterfriend is the only person actually nice to me.

Sisterfriend by What the boo boo boo ra ra ra June 1, 2020

Sisterfriend

Your sister, your only sister. She is your sister but a friend and the most amazing one at that.

First slurred out when I was drunk because there was no one word invented for her yet.

Sisterfriend is the best of both worlds: First she is your blood- Second she is your friend-confidant-reality check. Sometimes you fight and sometimes you get ridiculous with each other. She is a friend that will always be there because she has to- she's your sister duh!!!

I heart my sisterfriend so much but I'll slap that bitch if she borrows my clothes without asking again.

Sisterfriend by Callcp May 14, 2012

silverface 

The silvery appearance left after a man shaves his face. More prominent with Italians, Jews, Middle Easterns, or anyone else who's a hairy mofo.

Damn man, you shouldn't have shaved off your beard cuz now you got mad silverface!

silverface by Dr. Tongue April 25, 2006

Sistercest

having a realtionship or sexual relationship with your sister's ex

I can't believe my sister is fucking my ex. She's committing sistercest.

Sistercest by lexkatt December 2, 2010

sutterface 

a term used to describe an idiot or someone unaware of what is going on; one who often lacks commen sense in regard to slang terms and/or sexual knowledge

could also be used to describe someone who acts much younger than they really are

dont be such a sutterface

you get on my nerves sutterface

figure it out sutterface

sutterface by luke December 22, 2003