Grubber
A grubber was a term sometimes used in Victorian England to describe people who scavenged in drains for a living.

Grubber is also a colloquial name used in New Zealand for a mattock and in Australia as a term for a cricket ball which when bowled (as a result of lack of force) results in the ball either not bouncing enough to be hit by the batter, or failing to bounce at all.