will o' the wisp
See also: will-o'-the-wisp
- (British folklore) A strange light that attracts travellers from pathways into dangerous marshes or graveyards.
- (idiomatic) A delusionary or otherwise unachievable goal that one feels compelled to pursue.
- (strange light): ignis fatuus, spooklights, ghost lights, nightfire; hinkypunk (west Country dialect); jack o'lantern (US)