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Semen Sisters

When a group of women sleep with the same guy
That group of girls who slept with Brad are Semen Sisters
by Douggivemedome April 23, 2025
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Semen Sisters

When multiple women in a group share one guy
That group of girls that slept with Brad are Semen Sisters
by Douggivemedome April 23, 2025
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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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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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colon sister

When you and a friend are pooping at the same time, but don’t know it.
Ali: I just pooped
Player2: Me too!

Ali: No way! Colon sisters!
by yungshauzzie67 September 19, 2025
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