Saint-Louis-du-Ha! Ha!, Quebec, Canada
This town has is the only town in the world to contain two exclamation marks (for singles, see below)
Truth or Consequences, New Mexico
Originally named Hot Springs, the city changed its name to Truth or Consequences, the title of a popular radio program - in 1950, Ralph Edwards, the show's host, announced that he would air the program from the first town to rename itself after the show. The Hot Springs Chamber of Commerce saw it as an opportunity for free advertisement, a vote was instigated and eventually 4 to 1 of the town's citizens declared their support for the change.1, 2
Westward Ho! , Devonshire, England
This village was named after the 19th century novel of the same name, set in the Elisabethan era and on the subject of adventures, boats, the Spanish Inquisition, Indians and kidnapping.
Hot Coffee, Mississippi
A southern little town: http://ngm.nationalgeographic.com/ngm/0501/feature6/multimedia/multimedia.html
Two Egg, Florida
Originally called Allison after the area's mill company, the economic downturn of the Great Depression led to its collapse and left the town without a name. The following story describes how it acquired its somewhat unusual one. It was told by John Henry Pittman, who for ran one of the commnity's stores. Apparently, two young boys used to come in so often on errands from their mother to trade two eggs for sugar that regulars jokingly began calling it a "two egg store". The name, according to Mr. Pittman, caught on and was picked up by traveling salesmen and others who spread it to nearby towns, appearing on the official highway map of the State of Florida in 19401.
And finally...
A handful of dodgy placenames: the Austrian village of Fucking, the French town Condom, Hell in Norway, Penistone and Thong (both in the UK), Fort Dick (California), Sexmoan (Philippines), Nether Wallop in Hampshire, England, Titty Ho (Northamptonshire), Wetwang (Yorkshire), Slutshole Lane (Norfolk) and, because I live in Oxford, Crotch Crescent, Pusey Street (home to one of the religious foundations of the university) and Magpie Lane, which is innocent enough until you discover that it used to be a prostitute haunt, fittingly named Gropecunt Lane 4.
1.http://www.truthorconsequencesnm.net/area_TorC_ralph_edwards.htm
2.http://en.wikipedia.org/wiki/Truth_or_Consequences,_New_Mexico
3. http://www.twoeggfla.com/index.html
4. http://en.wikipedia.org/wiki/Magpie_Lane,_Oxford