1. (of soil) soft and watery
   "wet mucky lowland";
   - boggy, marshy, miry, muddy, quaggy, sloppy, sloughy, soggy, squashy, swampy, waterlogged, squelchy
    
2. Dirty and messy; covered with mud or muck
   "a mucky stable";
   - muddy

Derived forms: muckier, muckiest

See also: dirty, soiled, squidgy [Brit, informal], unclean, wet