adj. [ from jerk + water, a place where it is necessary to draw (jerk) water to supply the boiler of a steam engine. ] 1. small and remote and insignificant; as, a jerkwater college.
Syn. -- one-horse, pokey, poky. [ WordNet 1.5 ]

2. (Railroads) Off the main railroad line. [ Archaic ] [ PJC ]