what's-his-name

• what's-her-name (female)
• what's-his-face
• who's-his-face, who's-his-name
• what's-his-butt (North American slang, less common)

what's-his-name

1. A male person or entity whose name one does not remember or want to mention but that is known to the person to which one is speaking.
   • 1842, Robert Browning, Waring:

     I left his arm that night myself / For what's-his-name's, the new prose-poet / Who wrote the book there, on the shelf

   • 1885, W[illiam] S[chwenck] Gilbert, Arthur Sullivan, composer, […] The Mikado; or, The Town of Titipu, London: Chappel & Co., […], →OCLC:

     And 'St—'st—'st and What's-his-name, and also You-know-who— / The task of filling up the blanks I'd rather leave to you.

• you-know-who, so-and-so

• John Doe, Jane Doe