It is according to the slightly dubious orthography of Granny Weatherwax, a witch and headologist* in Terry Pratchett's Discworld novels who periodically has out-of-body (and usually in something else's) experiences and thus leaves this sign out so nobody will bury her by mistake. I feel that given my near-total absence from conversation in the last week or so, I may be in similar danger . . .

*It's like psychology, only practiced by Granny Weatherwax, which means it's something totally different.