what's the origin of this phrase

[marmont]

someone just walked over my grave

[andy hughes]

Some people believe that they are spsychically linked to the piece of ground that will contain their body after death. This belief also includes the notion that if someone walks over 'your' piece of ground, your link is disturbed, and you feel a sudden unexplained shudder, and usually advise those around you that 'someone has walked over your grave'. An alternative version advises that it must be a goose that walks over your 'grave' and this probably gave rise to the term 'goose bumps' to describe the raised hair folicles in your skin that react when you are surprised or frightened.

[allen ives]

Not really an answer, just an observation. Thomas Hardy, I think in a story although it might have been a poem, muses that each year we note and celebrate the date of our birth, but that each year we never notice the day of our (eventual) death as it, too, comes yearly round.