We tend to refer to ours as "the four door Miata."
A really bad name, considering other cars in the house are named "Rita" (the red street Miata), "Lola" (the race Miata, because whatever Lola wants, Lola gets), the "Econoguzzler" (the V10 Ford van), and "duh!" our dependable, no brains required to own and operate Corolla.