women's pants (or underpants) that are so tight, they cause the same effect as "camel toe" (vagina lips are visually split apart through the fabric)
"She has some serious rail splitters on today"
by HSW1987 May 19, 2010
A roadie specializing in arranging lines of nose candy on the tour bus. When the band is finished with their show, they have little slices of heaven waiting for them.
Groupie: Can you get me on the bus?
Railsplitter: No, but I can get you high as heeeelllllllll.
by Bum Stiggity Bum April 08, 2010

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