[口语]You rock！=You're great.
Hey. Buddy. Thanks for the nice dinner. You rock!
rock v. 摇动，摇晃
Every night, she needs to rock the baby to sleep.
be as solid as a rock 坚若磐石
The table is of high quality and is as solid as a rock.
on the rocks 酒加冰块的
A: Anything to drink?
B: Scotch on the rocks.