The phrase was first coined by James Joyce in his smash-hit musical, Annie, in which he geniously depicts the stereotypical Irish-male's concern for slamming whiskey and disrespecting women, especially the ones from the loins of his sinner wife. (See child support.) Several years later, Joyce also uses this phrase in a letter to his actual wife to describe his penis.
1) Beat that thing like a red headed stepchild.

2) Perhaps I can help you beat your red headed stepchild. With my mouth.
by Benjamin Franklin 1776 July 5, 2008
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According to popular belief red headed stepchildren are prone to severe discipline problems, rebelliousness and promiscuity.
Kena is such a red headed stepchild...no really she is she's run away from home as a kid and has slept with 400 guys.
by Sprydle March 11, 2005
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Usually the most loved child in a familial unit. (Step)Parents pride this child for their distinct good looks and amazing personality. Women LOVE a redhead. That's a fact.
Supermodel: "oh, look that sexy red headed stepchild!"
Supermodel 2: "I know! I just want to eat him all up!"
by Gingerton April 8, 2008
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IN BRIEF: In most cases, getting treated unequally, unethically, unfairly or unjustly.

1. Receive inappropriate or limited care, respect, or attention.
Most people can't take getting treated like a stepchild.
by Mr. Terrence L. Trezvant March 21, 2007
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To be soundly beaten; pwned/owned; utterly defeated; beaten severely

The term comes from the idea of gingers (people with red hair and fair skin) being inferior and/or worthless. See also: beaten like a red haired stepchild - this ginger version may be more commonly used in the UK.
"I've never played this game before; I'm going to get beaten like a ginger stepchild by her."

"If I come home late again, my dad is going to beat me like a ginger stepchild."
by hennahito April 4, 2006
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A child who has red hair and is also somone's stepchild.
- My stepson John has red hair.
- Oh, so you have a red headed stepchild.
by hans-åke December 20, 2008
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Something or someone needing or getting a very severe beating.
The next time l catch you punks hanging around my girls, l will beat you like a red headed stepchild's rental mule!!!
by I, Wreckerrr January 31, 2016
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