rail splitters 

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"

rail splitters by HSW1987 May 20, 2010

Rail splitter 

When she is lined upon reverse cowgirl and about to come down but you miss both holes and hit the taint

Man, last night, Carol came down on me and it ended up being a rail splitter

Rail splitter by PinHeadLarry3 November 9, 2017

illinois rail splitter 

when a women spreads her vaginal lips and massages your penis with them without insertion

you: "rachel's such a tease, she only gave me the illinois rail splitter last night after promising more."
me:" at least you got off"

illinois rail splitter by Wicked CP November 29, 2012

Rail splitter 

Who knows. what even is a rail splitter. They peaked when they had Emoni and haven’t been relevant since. They gon be an easy W and they are currently the worst team in the SEC. A rail splitter is the type of team you drop 50+ on with your eyes closed.

“Yo you see the rail splitters are 0-3 this season?”

Rail splitter by Huronstudentsection2024 September 13, 2023

Railsplitter 

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.

Railsplitter by Bum Stigity Bum April 8, 2010