"slob"

slob 1. mud, especially soft mud on the seashore. The Wexford slobs are one of the most important international sanctuaries for geese. Also slobland, a stretch of muddy land. 2. stupid, careless, coarse or fat person, slovenly, unattractive and lazy person. [1861] [<slab(a) 'mud' or 'ooze']

"Now the ships were pushed firmly downstream, and a new bridge (Carlisle Bridge, the future O'Connell Bridge) was built just above the new Custom House, which was itself built on slobland won back from the sea."
Thomas and Valerie Pakenham Dublin: A Traveller's Companion (1988).