the.com/milkman

means A person who delivers milk (and often other dairy products) to homes on a regular route, typically early in the morning.

from A straightforward compound of 'milk' and 'man,' tracing to the rise of door-to-door dairy delivery in industrializing cities, when home milk delivery became common enough to need its own job title. The milkman later picked up a cheeky cultural afterlife in jokes and folklore about suspiciously well-timed morning visits — a reputation earned, not etymological, but it stuck.