pesky pesky /ˈpɛski/

adjective

1. [Informal] Causing irritation or annoyance  ( bothersome , pesky [Informal] , pestiferous , plaguey , plaguy , teasing , vexatious , vexing , dratted [Informal] , annoying , galling , irritating , nettlesome , pestering , niggly )
   causing irritation or annoyance
    Tapping an annoying rhythm on his glass with his fork
   tapping an annoying rhythm on his glass with his fork
    Aircraft noise is particularly bothersome near the airport
   aircraft noise is particularly bothersome near the airport
    Found it galling to have to ask permission
   found it galling to have to ask permission
    An irritating delay
   an irritating delay
    Nettlesome paperwork
   nettlesome paperwork
    A pesky mosquito
   a pesky mosquito
    Swarms of pestering gnats
   swarms of pestering gnats
    A plaguey newfangled safety catch
   a plaguey newfangled safety catch
    A teasing and persistent thought annoyed him
   a teasing and persistent thought annoyed him
    A vexatious child
   a vexatious child
    It is vexing to have to admit you are wrong
   it is vexing to have to admit you are wrong