Originally, it seems there was a crude name proposed for this operator, based on 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.
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To further deflect attention from the taboo name, BooK then started another fwp thread and suggested "Baby Cart". Which was rejected by native English speakers on the grounds that they had never heard it used in everyday speech -- some suggested alternatives, such as "Baby Carriage", or simply "Pram". Many other names were proposed in this long thread, including:

• Baby Cart
• Supermarket trolley
• luge or sled
• fat brackets
• pram