Noun
water boy (plural water boys)
A man or boy who regularly supplies a sports team or other group with drinking water.
I don't think the NFL had the slightest intention of taking me, except as maybe a water boy. Joel McHale
Percy muttered. ‘I want to drown her.' ‘Be patient, water boy.' ‘Don't call me water boy. Rick Riordan
Okay, do not call me Aquaman. That's even worse than water boy. Rick Riordan
The dud of a memo by the near-treasonous water boy Devin Nunes was mostly about FISA repeatedly granting the F.B.I. permission to monitor Page’s contacts with Russians. Source: Internet
Robby Heil is the water boy for a high school football team in Michigan. Source: Internet