Originally, a crude name was proposed for this operator, as indicated by this response from BooK to Sebastien Aperghis-Tramoni:

> Hey Philippe, why don't you give the name we found for @{[]} ?

Because *you* found it, and want to have *my* name associated with it.

To deflect attention from the taboo name, BooK started another fwp thread, suggesting "Baby Cart" ... which was objected to by native English speakers on the grounds they'd never heard it used in everyday speech. Suggested alternatives included "Baby Carriage" and "Pram". Though many other names have been proposed, including:

• Supermarket Trolley
• Luge or Sled
• Fat Brackets
• Pram
• Turtle (update: suggested by Peter Krumins)
• Code Interpolation (update 2021: suggested by the LanX)
• Mexican Sledge (update 2021: suggested by the LanX ... which I sledged :)
• Mexican Sleigh (update 2021: LanX wearing a sombrero, riding a sleigh)

References Added Later

• Re^7: Ways of quoting (where BooK explains why he chose the Baby Cart name)
• Re^2: meaning of =()= (where merlyn rues not asking Larry Wall's daughter Heidi to coin a name back in 1994 after Heidi had successfully coined the name for the Spaceship operator <=>)