This is the name (translated) of a small village in
North Wales. Its main industries are
slate,
coal (now largely discontinued), and
guys who may as well already be dead and therefore don't care about the consequences of their acts. Compare
Aberystwyth.
I'm quite surprised so many people "got" that. For those still scratching their heads, look at : Llanfairpwllgwyngyllgogerychwyrndrobwllllantysiliogogogoch. There's Clever.