Musically, cock rock overlaps with blues rock, southern rock, hard rock, and arena rock, but what ties it all together as cock rock is an egocentric, tough-guy swagger and lots of ridiculous macho posturing. The lyrics often equate hard-rocking with virility and dangerousness.
The genre's primary audience was (and still is) guys with mullets and Camaros.
Though cock rock still gets plenty of airplay on classic rock radio, there are (mercifully) very few new practitioners of the style.
A prime example of cock rock is Poison. Just look at them. Their pants are uber-tight, because they like to show off the size of their packages.