How do I kill a thread with NN?

This partial list of city nicknames in the United States compiles the aliases, sobriquets and slogans that cities are known by, officially and unofficially, to locals, outsiders or their tourism boards. Some of the nicknames are positive, while others are derisive. The unofficial nicknames listed here are those that have been used for such a long time or have gained so wide a currency that they have become well-known in their own right.