Plump Sister

A woman who has put on a few pounds since the last time that a random 72 year old Uncle will say to Larry, the cousin twice removed, this kind of thing:
Uncle: "Golly! That's Suzanne? She has gotten to be a real Plump Sister since the last time I saw her."
Larry: "Must've been back in the Seventies. Before the kid. Kids. Who knows."

Uncle: "It was May 1979. When they got married...wow she just blimped out!" Larry: "Total butterball. Plump Sister, shame."
by MissPriss9 January 13, 2019
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Sister X

The sister with the most not-relative-siblings in Vietnam.
- Do you know sister X?
- Of course, she's the one with the most siblings in Vietnam.
by Bé Iu Của Chị X April 23, 2021
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sister zoned

When a guy/ girl you like says "you are like my sister" or "you are like the little sister I've never had" or "I love you like a sis" It is worse than being friend zoned, it's all the way past friends to family. You probably have a 2% chance of getting out of the sister zone and having a relationship with that person.
I thought we were on a date, but he sister zoned me twice. I guess we were just hanging out.
by Queen B, Bitch! June 04, 2015
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Step-Sister

Someone that will always help you get rid of that boner.
by Hey Bryce what do April 08, 2019
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Seven Sisters

Refers to the seven small contiguous states in the Nort East Region of India: Arunachal Pradesh, Assam, Manipur, Meghalaya, Mizoram, Nagaland, and Tripura.
The rest of mainland India is only connected to Assam properly; if you have to go to any of the other seven sisters, you need to make a stop at Assam.
by amsquareb December 18, 2017
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Kai's sister

Any girl who's brother claims she "knows" people in London but is actually just giving head to gang members.
Person 1: "Be careful I'll get my sister

on you"
Person 2: "she just sucks off gang

members. She's such a Kai's sister
by The Cherubist August 04, 2018
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Dong sister

2 female friends who have touched the same dong. No p in v or blowies required. The female version of Eskimo brothers.
Chloe stuck Sean's dong in her mouth and Beth gave it a handy. Now Chloe and Beth are dong sisters.
by DSLYFE June 11, 2017
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