PEST

[noun] [C] - an insect or small animal which is harmful or which damages crops, or (informal) an annoying person, esp. a childIf you have pests such as rats, mice or cockroaches in your house, you should contact the City Pest Control Department.The insecticide is supposed to kill all the pests that attack the maize plants.(figurative informal) The kids next door are real pests - they keep kicking their football into our garden and then trampling on our plants when they get their ball back.(figurative informal) Put that back, you little pest! [as form of address]