(rail transport, derogatory) A branch line train, using light equipment

(US, colloquial, derogatory) Of an inhabited place, small, isolated, backward. / (US, colloquial, derogatory, rail transport) Railroads with low traffic.

(US, rail transport, apocryphal) To fill a steam locomotive water tank manually from natural water supplies (a hypothetical process whose use has been discredited).

(US, colloquial, derogatory) Of inhabited places, small, insignificant, isolated, backwards

plural of jerk-water