Similar to spooning. However, the "little spoon" is larger than the "big spoon, thus giving off the image of a human jetpack.
Mark's girlfriend is like 6'2. I caught them jet packing in the common room watching the food network last night.
partaking of sex through a persons shoulder blades squished together to form a sort of half pipe shape while resting balls on the back of the neck.
My parents saw me lying face down and asked what the hell was going on. I told them i was jet packing