An example of a pest is a bug that keeps buzzing in someone's ear.
Stop being such a pest and leave that girl alone!
It is the most serious pest of cotton in the West Indies.
We have a pest problem.
He rolled his eyes at Jackson and muttered, "She is such a pest, no wonder you dumped her."
All right, suppose we bought a jar of live Praying Mantises at our neighborhood pest control store.
Since then this pest has spread across the African continent and even reached Madagascar.