Oobol

Oobol is a coin when shaven is almost worthless.

Behind the scenes

This appears to be a reference to the Obol, a an ancient greek silver coin. Which was a days wages for some vocations.

Circulating coins commonly suffered from "shaving" or "clipping", by which persons would cut off small amounts of precious metal from their edges to form new coins. Unmilled British sterling silver coins were sometimes reduced to almost half their minted weight. Many coins have milled or reeded edges, originally designed to make it easier to detect clipping.