Definify.com

Webster 1913 Edition

adv.

In a muddy manner; turbidly; without mixture; cloudily; obscurely; confusedly.

adv.

[from muddyl] Turbidly; with foul mixture.

Lucilius--writ loosely and muddily.

muddily ‎(comparative more muddily, superlative most muddily)

In a muddy manner.
- July 18 2012, Scott Tobias, AV Club The Dark Knight Rises
  Where the Joker preys on our fears of random, irrational acts of terror, Bane has an all-consuming, dictatorial agenda that’s more stable and permanent, a New World Order that’s been planned out with the precision of a military coup. Even his voice, projected muddily though[sic] that steel mask, has the authority of a prison-camp megaphone.