sloughy s (of soil) soft and watery the sloughy edge of the pond Usage(s) Secaucus, at the heart of a vast trash-filled marsh known, euphemistically, as the Meadows, is bounded by the ever dirty Hackensack River and two sloughy creeks. Synonym(s) boggy marshy miry mucky muddy quaggy sloppy soggy squashy swampy waterlogged