Means the same as "grown", but "ass" is added to belittle the person or thing referenced. Usually used in reference to a "grown ass man". (Note: it is important to distinguish between a "grown ass man" and a "grown assman." The former is an adult male, whereas the latter is an adult male who likes asses.)

"Grown ass" is part of the "ass" family label of disrespect. Also included are "dumb ass" (see also: "stupid ass"), "lazy ass", "punk ass", "crazy ass", "cheap ass", and "broke ass".
"He should know better! He's a grown ass man!"
"So, you mean he's an adult."
"That's what I said--a grown ass man!"
by Brianator37 January 12, 2015
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Referring to the age of a person. Same as Grown, but with emphasis.
My mother wants to know why I don't I call her anymore, because I'm a grown-ass man, thats why.

A grown-ass man should not be on welfare.
by Crazy Eyes H. Squeeze October 4, 2004
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A "grown ass man" will always put his kids and/or family's needs ahead of his own. He handles his business and has no need to refer to himself as a "grown ass man"

If someone calls themself a "grown ass man" it is most certainly because he is being a little bitch and not taking care of his responsibilities.
I can do whatever I want because I'm a grown ass man.
by WaltJr September 13, 2014
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A man who appears physically to be grown. Whose age is of a adult but his actions are of a boy.
Signs of a grown ass boy:

Whining when he doesnt get his way.
Calling a woman out her name over a simple issue.
He wasn`t raised right.
Acts like a different person all the time.
Comes in late at night and expects you to not say nothing and hide your feelings.
by youngandrestless95 December 16, 2013
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1- Used to reply angrily to an absurd suggestion

2- Used to ridicule a childish person
1- "That papercut looks pretty bad, do you need a band-aid?"

2- "Ow. I got a papercut and it really hurts."
"You a grown ass man, stop crying like a bitch."
by Dub-Fresh May 1, 2007
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A grown ass woman can take responcibility for her own grown ass actions and can pay her own bills and has has the maturity as well as the presence of someone handlin they business
She got her own crib, house, and money she a grown ass woman.
by Amber Coleman September 13, 2007
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A guy who acts like a kid. Doesn't mean he's immature just has the heart of a little kid because he never had that well of a childhood...
Kanye West - Through the Wire

And I still won't grow up
I'm a grown ass kid
Swear I should be locked up for stupid shit that i did
by some polak October 28, 2004
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