You would find rock baby in an urban thesarus under crack baby. Rock baby is a more street version of saying crack baby, since the original term has become mainstream.
Yo look at dat rock baby wit the big forehead and drool comin' out da corna of his mouf. His mother must have been suckin' on that pipe like it was her job.
by juan February 24, 2005
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Not to be confused with an actual child or the genre of music, 'baby rock' is a noun and can be created by combining the terms "Slept like a baby" and "Slept like a rock," and is generally used to describe a sound sleep.
I'm so tired, I'm gonna sleep like a baby rock tonight.
by ava_exists June 21, 2018
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Any light-hearted type of Rock music that is lacking in masculinity or 'mojo'.
"Hey man, you should check out Beach Fossils, they're a pretty sweet band"
"Nah, I'm good on that. Checked them out once before. They are baby rock. Not really my cup of tea. But thanks for the suggestion."
by Sal Vulcano February 26, 2015
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The most common version used today is:

Rock-a-bye baby, in the treetop,

When the wind blows, the cradle will rock,

When the bough breaks, the cradle will fall,

And down will come baby, cradle and all.
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Originated in Chicago to describe somebody who isn’t use to the effects they have on marijuana when they reach their high around people they baby rock can come about when trying to control your high and trying to make it seem as if you aren’t in fact high this affect wears off after u get something to eat
Look at man man he ain’t use to smokin yet

Nigga u high asl baby rockin and shit
by Patchthanutt December 21, 2020
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