step bro

the guy that step sister gets horny with
Step sis: "Step bro, what are you doing?"
Step bro: "I got stuck."
by The guy he is looking for February 13, 2020
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step bro

Your step brother that has a big shlong, and walks into your room with his big whopping penis out. While step sister is wearing a short flannel skirt.
Step bro: *walks in with big shlong out*
Step sis: what are you doing step bro?
Step bro:-_-
Step sis: :O
Step sis: takes off clothes
Step bro: *sticks shlong in step sis*
by Shlong69 December 05, 2019
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step bro

a mfer who gets a boner no matter what his step sister does and does not understand consent.
My step bro got a bone as I was washing the dishes
by insatiable 2128 April 02, 2021
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step bro

WHAT
sdfvbgnh lit step bro
by liknipsik August 27, 2019
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Step Bro

A guy who is not a blood relative therefore there is no risk of genetic mutations
Lucy is stuck in the sink cabinet and starts yelling for help. Ashton, her step bro, runs to the bathroom to see what all the yelling is about. He sees that his step sister is stuck, but in the position that she’s in, he notices that she’s got cake. Lucy was only wearing a blouse and short skirt with a very visible black lace thong. Ashton grabs her booty and massages it with his fingers. He then lowers the skirt, plays with the thong, and shoves his finger up her entering. Lucy lets out a loud yelp. “WhAt ArE yOu DoInG sTeP bRo?” She says. Ashton lowers her thong and starts playing with her clitoris with his left hand while jacking off with his right hand. Lucy is moaning in pleasure and suddenly, her insides feel like they exploded as her step bro pounds her. Lucy says in between her moans, “Did you use protection?” Ashton replies, “no risk of genetic mutation here” Ashton continues to pound her until the cabinet breaks and Lucy is now free.
by DaddyMints July 22, 2020
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Step Bro

A Pervy boy who likes to watch his sister master bate. When she catches him he fucks her to keep her quiet. They are usually scrawny and have a finely trimmed bush
Girl: What are u doing Step Bro
Boy: I’ll do anything to keep you quiet.

30 minutes later
OHHHH GAAHD I FEEL IT IN MY STOMACH
by MCALHWS February 07, 2019
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