An internet phoney. Named after a gimpy jackass in Washington State that buys a lot of 4-wheel drive Toyota Land Cruisers but never takes them on gravel roads, let alone off-road. He doesn't even work on them, short of having stereos installed and adding rubber nipples to the bumpers.
John is a real Landpimp. He's constantly on the internet claiming to be a Land Cruiser expert, but he has to call AAA when he gets a flat.
The Alaskan Landpipe is performed by shitting directly in to a condom and freezing it overnight. This action is typically followed by either shoving up an unsuspecting person's ass or eating it.
Guy1: Hey, what is that thing that you did with your shit and that condom?
Guy2: Oh, that was the Alaskan Landpipe!