PEST

Definition of PEST

  1. (noun)a serious (sometimes fatal) infection of rodents caused by Yersinia pestis and accidentally transmitted to humans by the bite of a flea that has bitten an infected animal
  2. (noun)any epidemic disease with a high death rate
  3. (noun)a persistently annoying person
  4. (noun)any unwanted and destructive insect or other animal that attacks food or crops or livestock etc.