To laugh so hard, and with your diaphragm that your entire body or upper torso jiggles/moves violently up and down.
JOL:Jiggling out loud
Jig is a shortened version
Jiggle:verb form, or a joke funny enough to cause jiggling
That was so funny I nearly jiggled to death.
I look ridiculous jiggling, but it's worth it.
I JOL'd after seeing you jiggle at my jiggle.