What is Rock It?
1.
To do what you do in an outrageous and marvelous way.
(made famous by select members of the 2008 senior class of scripps ranch high school, san diego.)
kathleen: how often do you rock it?
megan: on the daily!
See
2.
Used as an alternative to "Okay!"
Johny: Let's go see a movie.
Stanley: Rock it!
See