1. Plural of dinkey; small locomotives or engines used in logging, mining, or railroad operations.
Usage: informal; chiefly North American; historical/industrial
2. Plural of dinkey; small or insignificant things or people.
Usage: informal; colloquial

Examples

• The logging camp operated several dinkeys to move timber around the site.
• Old dinkeys from the early 1900s are now displayed in railroad museums.
• The railroad yard used dinkeys for switching cars between tracks.
• He dismissed their complaints as dinkeys not worth his attention.
• The antique dinkeys were carefully restored by the heritage railway society.