Since if one person "rails" another, then two persons committing the act on one person would therefore connect the hypothetical rails, resulting into a hypothetical train running through the receiver.
"Yo bro, let's run a train on that bitch from 48th Ave."
"Bruh we should run a train on the bitch from 10th Downing St."
"Bruh we should run a train on the bitch from 10th Downing St."
by Mr. Train Conductor June 05, 2025