mudlark

1. (slang, now rare) A pig; pork.archaicslang

2. (now rare, chiefly historical) One who scavenges in river or harbor mud for items of value, especially in London.Examples: "Besides these, there were the mudlark and the scupple hunter: the former prowling about at low water, receiving in his small bag such petty packages as he could get from his dishonest friends on board; and the later sneaking about the wharves and quays, under the pretense of wanting work, to pick up everything and anything that came to hand."; "She removes only what the water ‘delivers’ to her – items she can see lying on the surface. Unlike some other mudlarks, she does not dig for finds."; "Dr. Fiona Haughey, a London archaeologist who has worked on the Thames since the 1990s, said that although some mudlarks are looking for valuables, others are looking for a connection with the everyday objects of a bygone Britain."archaichistorical

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

4. (UK, regional) Any of various birds that are found in muddy places or build their nests with mud, especially Anthus petrosus and Alauda arvensis.UKregional

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