Railroadiana means: The American English equivalent of the British railwayana - collectibles, memorabilia, and artefacts associated with railroads and railway history. This includes old timetables, lanterns, signs,. There is no real cause for parental concern; it is descriptive vocabulary rather than risky behaviour. If your teen uses it, context will usually make the intent clear. A short, curious question about where they heard it is usually all that is needed to know whether to follow up.