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Algo Sisters

When two women have similar enough interests or tastes that they end up on the same advertising algorithm resulting in them regularly buying matching items unbeknownst to the other
Girl, I have that same dress. SHEIN ad hit you too? I knew it. We are Algo Sisters!!!
by MIDASG April 26, 2025
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A kevins sister

A really good looking girl that's beyond anything you've seen before.
Would you look at that girl?! She's a kevins sister for sure.
by Dickhandler6999 May 12, 2025
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Sister

The person that people think are the best people ever but really just make their older brothers their slaves. Loves to blackmail and tattle on you.
Sister: Gimme ice cream
Me: Nah go get your own
Sister: Imma tell mom about you saying the f word
Me:ok ill get u ice cream
by Lil’ Bad Boi May 14, 2025
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Tunnel sisters

When two women have sex with same man at different times
You fuckin made us tunnel sisters
by Crunchy toes May 25, 2025
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Standard Sister-in-Law Unit (SSILU) [300lbs]

Standard Sister-in-Law Unit
noun
*| \ ˈsta-ndərd ˈsi-stər-in-ˌlȯ yü-nət *
Abbreviation: SSILU
Symbol: 𝓢 or SIL

Definition:
An unofficial unit of mass equal to 300 pounds (136.08 kilograms), used to simulate high-risk, real-world human load scenarios in mechanical, structural, and transportation systems. The SSILU is commonly applied to test the failure thresholds of furniture, vehicle seats, elevators, bicycles, airline cabins, and public patience.

Etymology:
Originated in post-war American slang, the term is derived from the stereotype of a loud, heavyset female relative—often portrayed as emotionally volatile and structurally compromising—whose presence tests both family dynamics and infrastructure load-bearing capacity. While non-literal, the “sister-in-law” archetype evokes maximum physical and psychological mass concentration in civilian environments.

Technical Classification:
Measurement Type: Anthropomorphic Load Unit

Mass: 300 lbs (≈ 136.08 kg)

Field Use: Structural stress testing, emergency engineering simulation

Design Benchmark: Most consumer goods are not rated past 0.8 SSILU
“She hit the fitting room like a breaching whale—1 Standard Sister-in-Law Unit (SSILU) 300lbs in full stride, swatting children aside and hollering ‘THESE SIZES RUN SMALL!!! while nearby store associates quietly begged for a swift death
by Ludwig Von Snooterman June 7, 2025
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double quarter sister

When a person is a quarter sister both on the fathers side and also on the mothers side. The result of a wife swap.
1. Adam and Bertha has Edit. Bertha and John has Anna. John and Karen has Evelyn.
Edit and Anna are half sisters on Edits mothers side.
Anna and Evelyn are half sisters.
Edit and Evelyn are quarter sisters on Edits mothers side.
2. If also Adam and Karen has Maria.
Edit and Maria are half sisters on Edits fathers side.
Maria and Evelyn are half sisters.
Edit and Evelyn are also quarter sisters on Edits fathers side.
Hence Edit and Evelyn are double quarter sisters.
And Maria and Anna are also double quarter sisters.
When Edits dad Adam swaped wife with John she got a double quarter sister Evelyn, which she has never met since Edits mom Bertha hates Evelyns mother Karen.
by pappaperake April 18, 2024
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