Slow Coach.
A dawdle. As a slow coach in the old coaching-days “got on” slowly, so one that “gets on” slowly is a slow coach.
A dawdle. As a slow coach in the old coaching-days “got on” slowly, so one that “gets on” slowly is a slow coach.
Entry taken from Dictionary of Phrase and Fable, edited by the Rev. E. Cobham Brewer, LL.D. and revised in 1895.