Kirk and Spock about to enter a flivver
A flivver was a nickname given to an antique car, one made prior to 1940 or so.
Spock referred to the car that he and Kirk rode in to "put the bag on Krako" as a flivver. (TOS: "A Piece of the Action")
The car was in actuality a 1931 Cadillac V-12.