[umlautae]

Not sure if irony but cubit means a unit of length from an elbow to the end of the fingers. (BTW maybe that’s why people think giants were 100 cubits tall, when in fact the text said they were a group hundred hands strong)

[WalterBright]

It's a joke from a famous comedy routine where God tells Noah what the dimensions of the arc should be in cubits. At the end, Noah asks "what's a cubit?"