jack boy

noun2

1. •
   (slang) A low-ranking employee who is responsible for dispensing drinks to the other workers.
2. •
   (slang, no longer used) A boy or young man who is hired to run errands and perform unskilled labor.

   • Sore weeks later – at the end of August – one of three "jack boys" in the trimming room, a lad of 19 receiving something more than $20 per week, was taken ill and died. — 1920