Sister-in-Love

When the man or woman you are dating has a sister (that you actually like) you can refer to them as a Sister-in-Love"... cuz' marriage hasn't made your relationship a law yet.

I totally just called you my "Sister-in-Love" when talking about you to a friend. I rule.

by MissVirginia March 1, 2010

Cave sisters

Two or more females whom had sexual relations with the same male partner.

Whoa, you slept with Matt too?! Now we are cave sisters!

by Juhit March 2, 2011

Sausage Sisters

When two girls sleep with the same guy.

Those two girls are sausage Sisters.

by Jcbj7781 May 15, 2020

Sister Sin

A four-piece "old school" metal band from Gothenburg, Sweden. They are best described as being similar to Motley Crue, except for the fact that they have a female singer. Recently released an album called "The True Sound of the Underground," which features hard-driving songs such as the title track and "Outrage."

MAN 1: "Hey man, get a load of this song from Sister Sin!"

MAN 2: "Dude, that's awesome! It's like Crue, but the guy sounds like even more of a chick than Vince Neil did."

MAN 1: "That's because it IS a chick! And she's HOT!"

by SmilingJack March 7, 2011

Banger sisters

Two sisters that are down to bang the same dude.

Yea she was good, her sister was better...definitely the best banger sisters I’ve done.

by Shakeyjake123! November 25, 2018

scissor-sister

The female version of a butt-buddy. Two female friends who spend time with each other in excessive amounts.

Jill and Sara spend so much time with each other that they're scissor-sister(s)!

by John Clarkersoner April 23, 2010

blister sister

Someone who shows up when the real work is done then acts like they took part.

Dilbert and the intern spent days proofing the manual then Wally pulled a blister sister and ran a final spell check to claim all the work.

by billmanak February 10, 2009