Slang for the lucrative precious metals salvaged from scrapped electronics, such as gold plating on connector pins, silver in switches, and palladium in multilayer ceramic capacitors. Recyclers and hobbyists strip old motherboards and telecom gear to chemically extract these materials for profit.
Heard on the job
Don't toss those old telecom boards in the standard bin, there's a lot of digger gold on those edge connectors.