Wee Wil ‧ lie Win ‧ kie /ˌwiː ˌwɪli ˈwɪŋki/ BrE AmE
a character in a ↑ nursery rhyme (=an old song or poem for young children) who runs through the town wearing his ↑ nightgown (=a loose dress worn in bed) : Wee Willie Winkie runs through the town,/Upstairs and downstairs in his nightgown.