Car sounds like someone jumping on a spring bed

So when I drive down the road, the car sounds like someone is jumping on a spring bed. I push down on my rear shocks cause thats where the sound comes from, but they don’t make the noise…Ideas?

What type of car,mileage,age,type of front,rear suspension.How do you figure we can help you if you do tell us these things?

Sway bar rubber bushings do that a lot. Control arm bushings too.

More and likely a bushing of some sort.