the.com/teamster

means A truck driver who transports goods for a living, especially one who belongs to the Teamsters union.

from From 'team' meaning a pair or more of draft animals harnessed together, plus '-ster' (an old agent suffix, the same one in 'gangster' and 'youngster'). A teamster was literally one who drove a team of horses or oxen pulling a wagon. When trucks replaced horses in the early 1900s, the word rode along — and the International Brotherhood of Teamsters, founded in 1903 to organize wagon and delivery drivers, carried the horse-era name straight into the age of diesel engines.