Whatchamacallit, a shortened version of "what you may call it", may refer to:
Whatchamacallit, a placeholder name used for something whose name is unknown Whatchamacallit (candy), a candy bar made by The Hershey Company Whatchamacallit (album), an album by Brick Layer Cake, or the title track "Whatchamacallit", a song from the Pussycat Dolls' album Doll Domination "Whatchamacallit", a song by Ella Mai from her 2018 self-titled album "Whatchamacallit", a song from Esquivel And His Orchestra's album Exploring New Sounds in Hi-Fi