saleschild

plural saleschildren

1. derogatoryhumorousA child or young person who is selling something.

   “That's a fifty-inch screen,” the saleschild informs Rose for the second time, shifting to his left to talk past Rafferty.

   2014, Timothy Hallinan, For the Dead

   2 more examples

   In the flicker of his judgmental gray eyes, that saleschild had transformed my brightly sentimental, joy-to-the-world, pre-Christmas spree to a shambles.

   1991, Patricia J. Williams, The Alchemy of Race and Rights

   Still, be gentle with saleschildren. Odds are, this little boy didn’t take it into his own head to terrorize you with Christian M&M’s.

   2015 August 29, New York Times