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3. Rock Tits
When a person (typically a bro) is worked up and needs to calm down. See also Chill yo tits.
Dude, you need to heat your rock tits. I was kidding you bitch.
1. Rock Tits
Ridiculously unattractive fake boobs; breast implants looking as though ready to pop if touched.
Chris suffered a fractured penis while attempting to screw Michelle's rock tits.

Mike chipped a touch on Carrie's rock tits during foreplay.
by Charles Campbell Aug 8, 2005 add a video
2. rock tits
When someone's nipples become hard and pointy either because they are cold or because, in a girl, they are aroused.
Bethany's rock tits were a clear indication that it was getting cold out side.
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