filthy

Short definition from Wiktionary

Adjective

1. 1
   Covered with filth; very dirty.
2. 2
   Obscene or offensive.
3. 3
   Very unpleasant or disagreeable.
4. 4
   Angry; upset; severely annoyed.

Verb

1. 1
   To make very dirty; to saturate something with dirt.
2. 2
   To cover in filth.