A young person who has, well, an ass like a mom has.
A: Hey fathead, check out the mom ass on that broad at 3 o clock
B: Yikes that is indeed some serious mom ass
by Freddy Z June 24, 2005
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Something you yell at a really hot mother when she is walking down the street with her children, and make sure you are in a car.
*drive by a really hott mother.
MOM AAAAAAASSSSSSSSSSSSS!!!!!!!!
by phenompyrus April 21, 2004
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What becomes of a butt wearing Mom Jeans.

This is encouraged by pulling your jeans up to your belly button. You will notice that the ass looks elongated and flat.

This is not sexy. This is not even attractive.
Girl, you've got Mom Ass in those jeans!
by saltydogg087 October 27, 2010
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A mom's ass that looks like it was destroyed in the 80s and 90s and looks like a diaper. Especially when she wears sweat pants. Droops ever downward and looks and smells like cottage cheese. Sometimes, looks like a box when wearing tight jeans.
(Kid 1) Your not very nice .
(Kid 2) YOUR GIRLFRIEND HAS A MOM ASS
(Kid1) Well I'll give you that one.
by xX_BigDicc69_Xx March 5, 2018
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A phrase used among Muslims, typically used as a means of derailing a conversation when one person says something particularly hurtful or annoying to the other.
Fatima: Mohammed, why do you sound like a retard whenever you speak?
Mohammed: there's a jinn up your mom's ass.
by mynoduesp2303 November 7, 2018
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A mom who never takes care of her kid. Yet, she puts her step-son, and husband on a pedestal. She would pay thousands of dollars for her step-son to please her husband, but her real daughter to her is just a bitch ass piece of trash that doesn't matter. Don't fucking consider this kind of mom a mom.
Person 1: _____ is a fucking fake ass mom. I heard she spend 2000 dollars on her step-son, for school clothes, and didn't get her daughter anything for school.

Person 2: What a bitch!
by anonymous-bitch August 12, 2018
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