“Pipelining” is a practise primarily employed by travellers wanting to meet potential sexual partners in a future destination. Meetings are typically arranged online through social networking and dating sites. The objective is to have potential mates already ‘in the pipeline’ prior to arrival in a certain location, thus vastly increasing the chances of a sexual encounter with a local. The terms ‘Pipelining’ and ‘online game’ can be used interchangeably.
Origins: While I’ve done this for many years, I only coined the term recently. The word was inspired by an interview with Lumiere, where he talked about “[using] the internet to build a prospect pipeline of local women before [arrival].”
For a How-to guide check out Pipelining 101.