An expression which originated during a drunken late-nite discussion of the origins of expressions. It means, "I see what you're saying, where you're going with that."
Drunk person A: "Dude, you know what I mean?!"
Drunk person B: "Totally, Dude. I'm riding that train, reading that book."
Drunk person B: "Totally, Dude. I'm riding that train, reading that book."
by ripcurlgirl September 15, 2004
Same as saying, "I feel you."
Cool Person A: "So then, I told the guy that there was no way I would ever consider his lame-ass job, you know?"
Cooler Person B: "Yeah, man. I'm riding that train, reading that book. . ."
Cooler Person B: "Yeah, man. I'm riding that train, reading that book. . ."
by InThaNo July 12, 2007