A fork of Rural Dictionary
n. A penis, often in the context of intercourse.
"Yo wat u doin?"
"I'm ridin' the D-train. I get off when I get to the O."
n. A celebrity who has ridden to fame on the D-train.
"What do Paris Hilton, Pamela Anderson, and Monica Lewinsky all have in common?"
"each is a Cocklebrity."