In the episode, "Bookstore, The" (ep. #9.17), J. Peterman describes provides several euphemisms for the drug opium when he's describing Elaine's boyfriend's addiction. In the original airing, he referred to it as "smack...white palace...the Chinaman's nightcap". In all syndicated airings, the last part of that line was omitted, obviously because of its racial insensitivity.