Simple Definition of pesky
: making someone annoyed or irritated
Examples of pesky
I've been trying to get rid of this pesky cold for weeks.
<the pesky problem of what to do with all the leftovers>
Origin of pesky
probably irregular from pest + 1-y
First Known Use: 1775
Seen and Heard
What made you want to look up pesky? Please tell us where you read or heard it (including the quote, if possible).