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.
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
Get the double quarter sister mug.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*
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
Get the Sister mug.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
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
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