Green’s Dictionary of Slang

blind n.2

[SE blind, i.e. it has no windows]

1. [late 19C] an order to leave a town (presumably on the railroad).

2. [late 19C–1960s] (US tramp, also blind baggage, blind car) a baggage car that has no door at the end leading to the inside; thus it cannot be accessed while the train is in motion; thus blind baggage tourist, one who travels on such cars; jump the blind baggage, to ride in such a car.

In phrases

blind it (v.) (also beat the blind, blind baggage it)

[late 19C-1920s] (US tramp) to ride a blind baggage car.