To make love to a girl so incredibly gently that it looks to onlookers like u are giving her a gentle shake with your man parts.
as opposed to 'jump her bones'...which sounds like rape.
Dave: Oi Steve, check out the tits on that bird, id love to jump her bones!
Steve: Goodness me Dave, don't be so incredibly offhand. A beautiful lady such as that needs her bones shaking...not jumping. Id very much like to shake her bones.