A "teenage babysitter" refers to a teenager, usually between the ages of 13 and 19, who takes care of children for a short period of time while their parents are away. Full definition
In the film, Myers stalks teenage babysitter Laurie Strode, played by Jamie Lee Curtis, and Lauries friends Annie, played by Nancy Loomis, and Lynda, played by P.J. Soles, while «The Shape» (as he referred to in the script) is hunted by his psychologist Dr. Sam Loomis, played by Donald Pleasence. (halloweendailynews.com)
It takes a full 50 minutes of demystifying psychobabble before Zombie decides to get to the actual story of the grown Michael (Tyler Mane) stalking teenage babysitters on All Hallow's Eve, and it is dreadfully apparent that Zombie neither realizes nor cares about what made Michael frightening in the first place. (markreviewsmovies.com)
Memories of my Mexican honeymoon include noticing two very bored - looking kids and their equally bored - looking teenaged babysitter, making sandcastles almost every day. (havebabywilltravel.com)