pest

US /pest/
UK /pest/
"pest" picture
1.

a destructive insect or other animal that attacks crops, food, livestock, etc.

:
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The farmer used pesticides to control the pests in his fields.
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Rats and mice are common household pests.
:
nuisancebotherirritantannoyancetrouble
2.

a person or thing that causes annoyance or trouble

:
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My little brother can be a real pest sometimes.
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Stop being such a pest and let me work!
:
nuisancebotherirritantannoyancetrouble