Vermin

Noun

1. Any of various common types of small insects or other animals which cause harm and annoyance. .mw-parser-output .defdate{font-size:smaller}

   "The area was crawling with all sorts of vermin: fleas, lice, mice, and rats to name a few. Thus, we felt as if vermin were crawling over us."

2. An animal that preys on game, such as a fox or a weasel.
3. An obnoxious or mean and offensive person.

   "Bring these vermin to the Palace of Justice."