past participle of ride the ... train

(idiomatic) Home-taught manners and social etiquette. / Used other than figuratively or idiomatically: see home, training.

(historical) One of the trains, operating between 1854 and 1929, that transported orphaned and homeless children from crowded Eastern cities of the United States to foster homes located largely in rural areas of the Midwest.

plural of orphan train

A choke collar. / A shock collar.

plural of training collar

Synonym of toilet-trained

plural of milk train

(UK, colloquial) A slow passenger train leaving in the early hours of the morning. / (rail transport) A goods train that carried milk, usually in tank wagons.

A trackless train, made to resemble a real locomotive, used for transporting passengers short distances, and normally used in tourist resorts.