rock against as是

It took a while but now it's back
Back from the lab- it's in my hat
So you better run home
Get on the ************* phone
It's time to rock against ass, so
Pick up the ************* stone
Well I'm not in a hurry, no
I ain't in a rush
That rock is such a gift so make it last
No I'm not in a hurry but that ride is such a blast
I said Lord take me downtown 'cause it's a rock against ass so you better think fast
So you better get back
I had no choice -
I cut the leash
You can't control that rocky beast
So you better run home
Get on the ************* phone
It's time to rock against ass, so
Pick up the ************* stone