Pocketing is when the bar of the jewelry is exposed instead of the ends of jewelry which are under the skin in “pockets”. It has been called the anti piercing by some.
It looks like a staple of some sort and has not been said to heal well. It is also very likely to reject. It has the success rate to normal surface piercings, which is insanely low.
The jewelry is a custom curved bar with smooth ends instead of balls on the end. It is very important that the bar is made correctly for where it is going or else it will not fit.