1. jerk water - Noun
2. jerk water - Adjective
3. jerk water - Verb
(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, rail transport, dated) To scoop water from a track pan mounted on the tracks directly into a steam engine's tank without stopping.
jerk water (comparative more jerk water, superlative most jerk water)
(US, colloquial, derogatory) Of inhabited places, small, insignificant, isolated, backwards
jerk-water (plural jerk-waters)
(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.
Source: en.wiktionary.orgjerk-water