Meaning

noun necrotic tissue; a mortified or gangrenous part or mass

noun a hollow filled with mud

noun a stagnant swamp (especially as part of a bayou)

originFrom Middle English slogh, slugh, slouh, from Proto-Germanic *sluk-, perhaps related to *sleupaną (“to slip, sneak”) (compare Gothic 𐍃𐌻𐌹𐌿𐍀𐌰𐌽 (sliupan)). Akin to Middle Low German slô (“sheath, skin on a hoof”). Perhaps also related with Old Saxon slūk (“snakeskin”), Middle High German slūch, whence German Schlauch (“waterskin, hose”).

Etymology from Wiktionary, CC BY-SA 3.0