A man who marries a woman with children. The man then decides to take on the children as his own. Eventually, he runs out of love for said children and begins to treat them like shit. He tries to control their lives and degrades them in every way possible. The stepfather takes away the rights of said children and refuses to grant them any privileges in his household.
Friend: Dude, your stepdad's such a dick. He never lets you do anything...

Boy: Yeah. He's a shitty Stepfather Nazi.
by Trent T. October 18, 2007
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A person who has graduated from the 12 Step AA program, but who still exhibits all the other characteristics of an Alcoholic (but worse). These "Alpa-Male" wannabes generally show signs of massive ego, the mastery of all the World's knowledge, and the need for self-promotion. They generally come across as very gracious, but only help others that they think can return the favor many times over. They should be avoided at all costs.
As time went on, we began to realize that Todd was actually a Twelve-Stepfather to the group.
by Viking Guy May 2, 2007
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When one party works hard to build something and another party steps in at the last minute to finish the job and claim the work as their own.
Franchise used the stepfather effect to receive full credit for work he did not do by himself.
by Franchise01 December 25, 2017
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The psycho-sexual disorder that most stepfather's suffer from to some degree. It involves a severe crush on the stepdaughter.

WARNING SIGNS:

1. Missing or misplaced panties of the stepdaughter. 2. Stepfather staring at stepdaughter's breasts and/or buttocks. 3. The stepfather using long embraces (sometimes accompanied with an erection) as greetings and farewells, as an excuse to squish the stepdaughter's breasts into his body. 4. Expensive presents for the stepdaughter. 5. Jealous behaviour towards stepdaughter's boyfriends.
stepdaughter: Good morning dad.

stepfather: (barrels over and hugs stepdaughter) Good morning pumpkin.

stepdaughter: (Tries to squirm out of the perverts long hug.) What's wrong with you? Let go of me.

stepfather: I've been diagnosed with stepfather syndrome.

stepdaughter: Yuk!
by Cunty Fresh Fanatic November 7, 2010
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My stepfather is a good person.
by Sonyc September 22, 2023
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Parent's husband and non-father.
My stepfather is a good person.
by Samsonic September 9, 2023
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