The stock answer is that the discs are warped. This could be true in a small percentage of cases only. The vast majority of these case happen fairly quickly so the disc (half inch thick stesl) will not have warped in time. No, the asnwer is generally either stuck pistons in the calipers (or rather ONE stuck piston and the other works OK). The result is bounce and rumbling.
Take out the pads and make sure the pistons move smoothly. If not, lubcricate with a little brake fluid or change the piston seals or, easier and usually cheaper, change the caliper completely. If by any chance it is the disc being warped (and I repeat, this is pretty unlikely at normal service intervals), you can test it by spinning the wheel with dial guage on it. The easier way is visual - if the disc is warped OR the pistons stuck, the wear on the disc on one side will be uneven - bright parts and dark parts.
If this is the case, don't bother with the idea of getting the discs 'trued' on a lathe - buy new ones since it is easier and cheaper and in any event, a disc has a minimum thickness. If your disc is actually warped, you will be under this thickness. Buy new ones.
if rumble you mean fight and sentence you mean statmane then yes
If you mean if he won at the royal rumble then yes.
To fight. As in, get ready to rumble.
You mean Brembo Brakes, there's no such thing as Rambo brakes
It means check your brakes.
It means it is time to have your brakes checked.
stop
Wheel Bearings are most likely worn.
ready to party!
Prone to it - NO. Do these parts, brakes and suspension/steering need maintenance and repair..sure.
Cover the brakes
The ring gear on the differential might be misaligned.