Swansea, originally called 'Swans E', was named after a Class A drug used by swans and other wildfowl.
Swansea is now a very beautiful Welsh city. There is a coastal region off Swansea called Mumbles. It is so named because it is for Welsh people that cannot speak audibly and don't mix well. They also complain a lot and are not very confrontational.
If you go to the cafe in Mumbles and ask for a toasted teacake they will take your money and then reply "mmmmgnuffmmmm gnuffmumumum blu mumble" (Whatever that means?).