Definition of "dudine"

A very pretty little dudine of Fifth Avenue is much admired by the dudes in her neighborhood, and it has been observed on several occasions that she appeared to be able to discriminate between them, and not only shows a preference for one dude over another; but is able to recognize the dudes she likes after an interval of separation. It is said, also, that in accepting the attentions of her dude wooers, she shows a peculiar mimicry of the coquettish manners of human girls.

1883 March 7, “Animal Intelligence: Facts Tending to Throw Light on the Question: ‘Do Dudes Reason?’”, in Puck, volume XIII, number 313, New York, N.Y.: Keppler & Schwarzmann, page 299

"Dude" was originally a name for ranch vacationers with no disrespect attached, but it later became derisively associated with clueless easterners who knew nothing of Western ways, as portrayed by Bob Hope in Son of Paleface (1952). Junior's fiancé[sic – meaning fiancée] (Jane Russell) tells him to "go out West." When Junior (Bob Hope) wants to show that he has become a Westerner, he wears a tall outsized white hat like Tom Mix and white wooly chaps, the traditional movie outfit representing an eastern dude. A female dude was known as a "dudess" or "dudine."

2014, Jeremy Agnew, “The Image Persists”, in The Creation of the Cowboy Hero: Fiction, Film and Fact, Jefferson, N.C.: McFarland & Company, page 212