sister-in-law

1- Sibling's wife.
2- Spouse's sister.

My sister-in-law is a good person.

by Wonbig October 13, 2021

Sister Jonathan

Sister Jonathan is a nickname for Jon Guelas , member of the english band United Vibe , that has been gaining popularity between fans of the band and also with some of the X Factor 2018 members.

Giovanni Spano: "We need sister Jonathan. Do we? Okay. "

by sister 5.0 November 3, 2018

Eats his sister

A euphemism for incestuous behavior, usually oral sex, with one’s sister.

“Alexander eats his sister every night.”

by RhodyRhodesRhodesia October 27, 2021

half-sister

Female that has one parent in common with another living being.

My half-sister is a good person.

by Sonyc September 22, 2023

Sister

A gay man who isn’t masculine.

Gay: 1: omg look he’s so cutee *shows pic*

Gay 2: oh girl he’s a sister..

gay 1: what?? He doesn’t even look like one..
*blocks to avoid bumping purses*

by Bakesbykay March 7, 2025

Shaft sister

When two or more girls have hooked up with the same guy

Girl 1: "I hooked uo with Brian last week"
Girl 2: "So did I! Now we are shaft sisters girll"
Girl 1: "PERIODT"

by badbitch123456 January 30, 2021

Abunai Sisters

One of the Production I.G. infamous CGI animated anime that they never dare to speak of ever again.

Abunai Sisters tells the tale of two main characters named Koko and Mika, who are tasked to guard the precious Booby Stone from the hands of an old lady who looked like that grandma from the movie Spirited Away and some weirdo who's holding a binoculars. The titular Abunai Sisters use their cleavage to attack and protect from danger, and when they detect a danger, their cleavage shakes like an emergency alarm of some sorts. What the fuck.

"Abunai Sisters is the best anime I've ever seen."

by JohnCheeseCamembert September 6, 2022