Pronunciation: (muk'ē), [key]
—adj., muck•i•er, muck•i•est.
1. of or like muck.
2. filthy, dirty, or slimy.
3. Brit. Informal.
a. obscene: a mucky story.
b. nasty; mean or contemptible: a mucky trick.
c. (of weather) oppressively humid.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.