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stepsibling 

Stepparent's child what is parent's stepchild.
My stepsiblings is a good person.
stepsibling by Sonyc September 22, 2023

stepsibling 

My stepsibling is a good person.
stepsibling by Coldandhot October 14, 2023

stepsibling 

Parent's stepchild and stepparent's child simultaneously.
stepsibling.
stepsibling by Simaduria July 27, 2024

stepsibling-in-law 

1- Stepsibling's spouse.
2- Spouse's stepsibling.
stepsibling-in-law by Wonbig October 13, 2021

stepsibling-in-law 

1- Stepsibling's spouse.
2- Spouse's stepsibling.
stepsibling-in-law by Simaduria July 27, 2024

Step sibling 

Your new sibling after your mom/dad remarry and have a child or bring a new child into their family
Alex: My dumbass dads getting married next weekend and then I’ll have a new step sibling and dude she fuckin hot as hell and she’s got some great biscuits and tits

Riley: damn dude ... can I date her then?
More from Urban Dictionary

trucker's tan 

A sunburn or suntan focused on the left arm. It is caused by the left side of the body being the only half that gets exposed to sunlight while driving. Presumably, it would be located on the right side of the body in countries where they drive on the left side of the road.
I had a trucker's tan after driving for 10 straight hours on a sunny day.
Word of the Day on October 5, 2026
The phenomenon where adults salivate at children's toys
Every time I walk into the toy aisle, I catch myself kidulting over the latest action figures and LEGO sets!
kidulting by Emotional Cruiser October 12, 2025
Word of the Day on October 4, 2026
British slang for a scientist or technical expert, esp . when the speaker is not certain of the expert’s specific field of study. Not necessarily derogatory, but typically used by persons without a technical background. In the US, the equivalent would be “egghead”, “squint”, or “geek.”

Origin of the word is unknown. Started sometime in World War 2. Given the typical evolution of British slang, could easily have started because what these experts did was confusing or “baffling” to the common person.
According to the boffins downstairs, the murderer used a serrated blade.
Boffin by Agnon February 11, 2023
Word of the Day on October 3, 2026
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