In folklore, a will-o'-the-wisp, will-o'-wisp or ignis fatuus, is an atmospheric ghost light seen by travelers at night, especially over bogs, swamps or marshes.

Will O the Wisp idiom phrase meaning?

/ˌwɪl.ə.ðəˈwɪsp/ something that is impossible to get or achieve: Full employment is the will-o'-the-wisp that politicians have been chasing for decades. Unachievable.

What is the plural of Will O the Wisp?

singular. will o' the wisp. plural. will o' the wisps.