1. Plural of mongo; a person who collects or deals in discarded items or scrap materials.
Usage: informal; chiefly North American
2. Discarded or waste materials, especially from manufacturing or urban sources; scrap.
Usage: informal; chiefly North American

Examples

• The mongos sorted through the recycling bins looking for valuable metals.
• Old mongos from the factory were sold to the scrap yard.
• He made a living collecting mongos from the city streets.
• The warehouse stored mongos until they could be processed.
• Mongos were separated by material type before being melted down.