What is the abbreviation of BMW?

1) In American slang, some "abbreviations" for BMW are Beemer, Beamer, Bimmer and Bee-em.

BMW is itself an acronym for "Bayerische Motoren Werke" (Bavarian Motor Works).

This abbreviation is also used by:
"Biodegradable municipal waste
Bob Marley & The Wailers
Boy Meets World"
http://en.wikipedia.org/wiki/BMW_(disambiguation%29


2) "Bayerische Motoren Werke AG (info) (BMW), (English: Bavarian Motor Works) is a German automobile, motorcycle and engine manufacturing company founded in 1916. It also owns and produces the MINI brand, and is the parent company of Rolls-Royce Motor Cars. BMW is known for its performance and luxury vehicles."

"The English slang terms Beemer, Beamer, Bimmer and Bee-em are variously used for BMWs of all kinds, cars, and motorcycles.

In the US, specialists have been at pains to prescribe that a distinction must be made between using Beemer exclusively to describe BMW motorcycles, and using Bimmer only to refer to BMW cars, in the manner of a "true aficionado" and avoid appearing to be "uninitiated."

The Canadian Globe and Mail prefers Bimmer and calls Beemer a "yuppie abomination," while the Tacoma News Tribune says it is a distinction is made by "auto snobs." Using the wrong slang risks offending BMW enthusiasts. An editor of Business Week is satisfied that the question is resolved in favor of Bimmer by noting that a Google search yields 10 times as many hits compared to "Beemer."
Comparably, the motorcycle marque BSA is sometimes pronounced Beezer.

The initials BMW are pronounced [beː ɛm ˈveː] in German. The model series are referred to as "Einser" ("One-er" for 1 series), "Dreier" ("Three-er" for 3 series), "Fünfer" ("Five-er" for the 5 series), "Sechser" ("Six-er" for the 6 series), "Siebener" ("Seven-er" for the 7 series). These are not actually slang, but are the normal way that such letters and numbers are pronounced in German.
In Spanish, the brand is pronounced "Be-me-uve" which literally is "Be-em-vee" and not "Be-em-double u" as it should be. The slang for it can be seen as "Bemeta"."
Source and further information:
http://en.wikipedia.org/wiki/Bmw