1. Having unwanted sexual intercourse with two people on train tracks.
2. Fucking a train
Harry and Carrey were trainfucking late at night
An autistic person or someone who acts mentally inferior in a way that mirrors the common behaviors of an autistic person.
Bradley wouldn't stop talking incessantly about random shit and is always rambling nonstop about old Sega games. He's such a trainfucker!!
An autistic person or someone who shows autistic traits. Identifiable by their poor social skills, tendency to hyperfixate on one topic, uncanny ability to make the opposite sex uncomfortable, and general inferiority to those not on the spectrum.
Bradley wouldn't shut up about old Sega games despite my obvious hints that I was not interested in what he was saying. He's such a trainfucker!!