Aka “Bonus Mom

Marries a man with children and because she loves said man so much, she adopts his kids into her heart and puts up with a lot of backlash because of it such as BM hating her existence and forcing children to do the same. Step moms are saints but are often not allowed to make important decisions for the children or love them despite step mom’s love and adoration for said children.
Her step mom gives her hugs and tells her she loves her so much. What a lucky kid to have such a loving step mom!
by WanderingTAPdancer September 24, 2018
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A woman who is smart enough not to get married again, but still takes her partners children under her wing and treats them like her own, giving support both financially and emotionally. She cooks dinners, does laundry, cleans and even car pools. She typically gets no respect from the children until they are adults, but because of her love for her partner, she sees the importance of stepping up, even though she is not a step mom.
"Is that woman who does so much for you your step mom?"
"No, she's not married to my dad. She is my psuedo step mom."
by Woman of the year March 3, 2014
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A woman who quite literally is a motherfucker, who is more manly than a father. Typically owns more tools, alcohol, and firearms than most men. Has the fighting capabilities to whoop yo ass. She also possess female capabilities such as cooking, cleaning, and household renovations.
It’s a woman, it’s a man…it’s a STEP-MOM-DAD!!
by BigWhiteCaulk February 10, 2022
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A big-ass nice, titty ass, selfish ass, milf-ass mother fucker!!!
by Thomas Cameron February 18, 2019
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A mother figure to a child that is not married to the father.

A mother figure that stepped-up to the plate.
This is my dad and step-up mom, they take care of me.
by BoxedCheri February 16, 2017
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That person that was completely normal until it was someone's bright idea to bang their Step mom so they could post them doing it on the hub.
Jack: My step mom is so kind to me!
Harry: Yeah only cos you bang her.
by INeedTherapyPleaseHelp June 25, 2023
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