BMW X5 G-Power Typhoon

The initials BMW are (ˈbeː ˈɛm 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 said in German.
The English slang terms Beemer, Bimmer and Bee-em are variously used for BMWs of all kinds, cars, and motorcycles.