- a small, unimportant town, especially one along a railroad line.
- a short talk from the rear platform of a train, especially during a political campaign.
- a brief appearance, single performance, or the like, in a small town, as during a political campaign or theatrical tour. (http://dictionary.reference.com/browse/whistle+stop)
"Then, almost as a challenge, the pro-Escandón newspaper in Mexico City, El Diario, announced in mid-week that Escandón's champions would shortly begin a whistle-stop tour through Morelos."
- John Womack, Zapata and the Mexican Revolution