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A socially incompetent and borderline-creepy male virgin over the age of 23 who wears kakis/jeans with running shoes and probably still plays with trains.
"Do you see that dude staring at me awkwardly over in the corner? Ugh, what a train boy. He's sooo below my league."
by boob-dylan May 18, 2017
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It’s a term you call a guy when he is your soul mate but he is with another woman.
Me: he keeps going back to his wife but says our souls knew!

Friend: he’s a player, He’s a train boy.
by Wahsner June 14, 2018
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