quarter sister

The half sister of my half sister or half brother.

Amy and Randy had Josie. Randy and Patty had Vanna. Patty and Bob had Andy.

Vanna is Josie's half sister.
Vanna is Andy's half sister.
Josie is Andy's quarter sister.
Andy is Josie's quarter brother.

by onegreenfroggie August 15, 2009

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italian sister

When you receive a blowjob from a dude in the dark with a mustache but it doesn't count as being gay because you cannot see it.

Last night I got an Italian sister from Frank.

by The real White Fury October 9, 2017

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Spear Sisters

Refers to two women who have slept with the same man.

Woman 1: how'd you score those free drinks?
Woman 2: the bartender and I are spear sisters.

by Picklesandbacon June 13, 2015

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menstrual sister

one of two (or more) women who happen to fall on the same menstrual cycle. Menstrual sisters often times find comfort in sulking, eating, complaining, and causing a scene together.

My menstrual sister, from the stall next to mine, threw a tampon at me as I kicked my door in anger.

As a good menstrual sister, I shared my chocolate as we bled and weeped together.

by PrincessGaylordFocker December 11, 2016

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Sister Katie

An annoying hawt BFF girl names Katie who likes being addressed like a nun.

Girl 1: Hey look it’s sister Katie

Girl 2: Omg I knew a sister Barbra back in the 30s.
Girl 1: yea she’s weird and stupid and annoying but gorgeous.

Girl 2: I wish we could all be like sister Katie. Also have you seen her bestie?
Girl 1: Omg!! Who I thought she was lonely and had no friends. Because she acts like a nun.

Girl 2: Her name is Sister Audrey.

Girl 1: Omg I thought Sister Audrey was only a legend, but she is real and hawt.

by Sister69 July 16, 2021

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