What does it mean when we say something/somebody Rocks ?

Rocking way to promote ... you rock!

 

Definitely !
he knows what to do

 

For those of you in Rio Linda, that's like saying...You are one kool dude!! OR You are a HOT stud muffin/chick. OR I wish I could be just like you. OR I envy you!!!!

 

Or "you must be a super hero, like Spider-Man" hahaha

 

i seen the spider man (Part One)
it was a great movie , i wish to play movie as a hero
i think i can do that

 

You're so funny I guess the Rocks is between excellent and amazing IMO...this is what I'm thinking of when I'm using this context

 

Boy, your question rocks....
But, I don't think my answer was much of a help... LOL!