jack up (something)
to raise prices, to raise something with a lifting device
The gas station jacked up their gas prices during the storm.
We jacked up the car so that we could change the tire.
Myth about Airplanes
HUMAN WASTE IS DUMPED FROM THE AIR
It was technically impossible for a pilot to dump waste whilst in flight. It s held in a closed system with no ejector button. Moreover, this would be illegal. If someone was hit by human waste from a great height it could cause injury and lead to serious legal cases. No airline would take such a big risk, especially considering the number of flights completed each day.