PCOP or pussy cut off point dates back to the Viet Nam war. It refers to that time interval prior to going on R&R whereby one could recover from the clap ahead of hooking up with one's girlfriend or wife.
The World equals continental US.
LBFM equals Little Brown Fucking Machine.
Bud, do you want to hit some LBFMs tonight?
No, man, I've reached my PCOP and I'm off to the Wrold next week.