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

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

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

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

plural of jerk-off

Alternative spelling of jerkoff

plural of knee-jerk

(vulgar, countable, slang, US) An annoying person. / (vulgar, uncountable, US) An act of masturbation. / (film) A stunt in which the performer is suddenly pulled off a horse, etc. by means of a cable.

(dated) Used other than figuratively or idiomatically: see jerk, off. / (idiomatic, slang) To masturbate, usually a male. / (intransitive, vulgar) To do nothing; to waste time.

Unthinking, not carefully considered, (nearly) automatic, spontaneous, easily predictable.