(If you enabled the time option, then "T:1" indicates that it is turn 1. "Zorkmids" are the currency of NetHack.) The message is a reference to the Monopoly board game, in which one penalty is, "Go directly to jail. Do not pass go. Do not collect $200." Monopoly players periodically pass the Go space on the board and earn 200 more dollars each time. Players going directly to the Jail space must not pass Go, even if Go is between their current position and Jail.