filthy

adj

1. Covered with filth; very dirty.

   “The coaches were filthy outside and did not appear to have been painted or washed for years. Inside there were uncomfortable seats covered with a cane-like material.”

2. Obscene or offensive.

   “Filthy smirking Pat Robertson has come in second in the Iowa Republican caucuses.”

3. Very unpleasant or disagreeable.

   “Oh, that filthy dream again. Nightmares are bad enough but when it comes to night-toads—!”

4. (Australia, slang)Angry; upset; severely annoyed.

   “Terrific fun it was. My best mate saved me, and the teacher was filthy.”

verb

1. (transitive)To make very dirty; to saturate something with dirt.

   “In the years following World War Two, Americans cut down vast forests, built thousands of factories, assembled millions of atmospherically toxic automobiles, and filthied the water throughout North America.”

2. (transitive)To cover in filth.

   “He shouldered his way inside, filthying his T-shirt on the charred wood.”