'Filthily' definitions:

Definition of 'filthily'

(from WordNet)
adverb
In a filthy unclean manner; "a dirtily dressed camel driver" [syn: dirtily, filthily]

Definition of 'Filthily'

From: GCIDE
  • Filthily \Filth"i*ly\, adv. In a filthy manner; foully. [1913 Webster]