mudlark

noun

1. (slang) A pig; pork.

2. One who scavenges in river or harbor mud for items of value, especially in London during the Industrial Revolution. Also applies to a person scavenging in sewers. A person who begs near a river. (rare) A sewer cleaner. (rare)

3. A child that spends most of its time in the streets, especially in slum areas. A child who plays in the mud. Any dirty or unkempt person.

4. (slang) A soldier of the Royal Engineers.

5. Any of various birds that are found in muddy places or build their nests with mud. Especially Anthus petrosus and Alauda arvensis.

6. (Australia) The Grallina cyanoleuca that builds its nest with mud into a bowl-like shape.

7. A racehorse that performs well on muddy or wet tracks.