Stepbrother 

Someone who has to pull his stepsister out a washing machine

STEPSISTER STOP GETTING STUCK IN WASHING MACHINES! stepbrother screams

Stepbrother by Iwillkillmyselfwithpeanuts September 9, 2020

Stepbrother 

Friend to have sword fights with

I beat my stepbrother in a sword fight yesterday

Stepbrother by Rectum rocker May 15, 2009

stepbrother 

The son of one's stepparent by a marriage other than with one's own parent.

My stepbrother is a good person.

stepbrother by Wonbig October 13, 2021

stepbrother 

Stepparent's son what is parent's stepson.

My stepbrother is a good person.

stepbrother by Sonyc September 22, 2023

stepbrother 

Stepparent's son (parent's stepson).

My stepbrother is a good person.

stepbrother by Coldandhot October 14, 2023

stepbrother 

Parent's stepson and stepparent's son simultaneously.

stepbrother.

stepbrother by Simaduria July 27, 2024

stepbrother-in-law 

1- Stepsibling's husband.
2- Spouse's stepbrother.

My stepbrother-in-law is a good person.

stepbrother-in-law by Wonbig October 13, 2021