Green’s Dictionary of Slang

(US) Pittsburgh.

1890		Dead Bird (Sydney) 4 Jan. 3/3: Tho following story is said to owe its origin to the Pittsburg Dispatch [...] About a dozen years ago, when Fanny Devonport was playing an engagement in the Smoky City [etc].
1892		Times (Philadelphia, PA) 8 May 15/4: Why, there’s about seven hundred young men just like that right here in Smokeburg.
1899–1900		C.L. Cullen Tales of the Ex-Tanks 165: There’s not enough room for me and that wise sleut’ from Smokeburg in th’ same time.
1907		Butter Miner (MT) 14 June 2/6: Rain at Smokeburg. Pittsburg-New York game postponed.
1916		El Paso Times (TX) 2 July 26/3: Jack the Giant Killer [...] the big boxer from Smokeburg.
1957		Morn. Call (Allentown, PA) 9 June 43/5: Mintz brought Charles to ‘Smokeburg’ and got several good wins.
1960		Palm Beach Post (FL) 4 Dec. 4/4: Smokeburg has no monopoly on the increasing cost of construction.