Burger King is a fast food restaurant chain that began in 1953. The Burger King nickname of “Booger King” has been cited in print since at least 1990. The name “booger” is often said by children who cannot pronounce “burger.”
 
Burger King has also been nicknamed the BK Lounge. Another “burger/booger” restaurant nickname is Five Guys Boogers and Flies (Five Guys Burgers and Fries).
   
 
Wikipedia: Burger King
Burger King, often abbreviated as BK, is a global chain of hamburger fast food restaurants headquartered in unincorporated Miami-Dade County, Florida, United States. The company began in 1953 as Insta-Burger King, a Jacksonville, Florida-based restaurant chain. After Insta-Burger King ran into financial difficulties in 1955, its two Miami-based franchisees, David Edgerton and James McLamore, purchased the company and renamed it Burger King. Over the next half century, the company would change hands four times, with its third set of owners, a partnership of TPG Capital, Bain Capital, and Goldman Sachs Capital Partners, taking it public in 2002. In late 2010, 3G Capital of Brazil acquired a majority stake in BK in a deal valued at US$3.26 billion. The new owners promptly initiated a restructuring of the company to reverse its fortunes.
 
At the end of fiscal year 2011, Burger King reported it had more than 12,400 outlets in 73 countries; of these, 66 percent are in the United States and 90 percent are privately owned and operated.
     
Google Groups: alt.peeve
Booger King peeve (was Re: McDonalds Peeve)
Brian L Moore
10/17/90
.(JavaScript must be enabled to view this email address) (Deborah Brown) writes:
>I am especially peeved at Booger King for switching to Coke, as they were the
>most convenient fast food restaurant for me who carried Pepsi. 
   
Google Books
The Brothers K
By David James Duncan
New York, NY: Bantam
1993
Pg. 334:
If you were the sort of red-blooded, Chicago Bear-lovin’, ass-chasin’, shit-kickin’, four-wheel-drivin’ honcho who could, without question or indigestion, daily swash down three or four Styrofoam-swaddled units of Booger King cuisine with a quart or two of the wee-wee that made Milwaukee famous ...
 
Google Books
Uncles:
A Tribute to the Coolest Guys in the World
By Russell Wild
Chicago, IL: Contemporary Books
1999
Pg. 103:
Burger King. My nephews and I call it “Booger King,” which is not necessarily an insult, although it certainly could be interpreted that way. It all depends on the intonation, which changes depending on how long the Whoppers have been sitting out before we bite into them.
 
Google Books
Rocket Religion
By Nat Seymour
New York, NY: Writers Advantage
2002
Pg. 267:
“How about BK, man?” Ski asked Renner.
“Good for me.” Renner turned to the rest of his team. “Team Four, who’s up for Booger King after we get out of here?
 
Google Books
The Everything Kids’ Gross Jokes Book:
Side-splitting Jokes That Make Your Skin Crawl!
By Aileen Weintraub
Avon, MA: Adams Media
Pg. 58:
What do you call a restaurant where everyone picks their nose?
Booger King.
 
Urban Dictionary
Booger King
A derogatory name for Burger King.
(...)
by Libertine Oct 3, 2005
 
Google Books
The American Sandbox Dictionary of Children’s Mispronounced English
By Alfred Zamudio and Alvin Zamudio
St. Louis. MO: Reedy Press
2010
Booger King [BOOHG-r keeng] proper noun An American fast food restaurant established in 1953 by Keith J. Kramer and Matthew Burns that specializes in preparing flame-broiled burgers that have since become internationally known.
 
EnglishPatterns
Restaurant Nicknames:
by SVOdude » Tue May 15, 2012 11:10 pm
(...)
Burger King = Booger King, whopper king, Home of The Whopper!, Burger Fling