A genre of music that actually involves talent in which singers, with an actual vocal range, with actual musicians , who actually know their instruments, actually play technically-important music that can't be done by 5 minutes of Fruity Loops, Acid Pro, or some other home-crapshop recorder.
The main instruments usually in rock bands are the electric guitar, bass guitar, drums and sometimes keyboards.
2. To have sex. this meaning is no longer in use.
2. Me and my girlfiend were rock 'n rolling all night long. It was pretty okay.