Basically what you call the Warthog in Halo 2 when you wish to de-level in Xbox Live, but with a fun twist.
What you do is grab the hog, drive to the enemy base and circle it repeatedly, all the while shouting all the different words for 'breasts' as you can think of. This can include slang words such as 'Milkmaids' and 'Bongos', and more recognised words such as 'Tits' and 'Boobies'.
David: Wanna de-level in Halo 2?
Jack: Sure. Grab the Boobmobile.
<Both members get in Hog and drive to enemy base>
David and Jack: BOOBIES! BREASTS! TITS! BOOBS! BREASTICLES! TITTIES! BOSOMS! JUBBLIES! CHESTICLES! KNOCKERS! CHARLIES! BOUNCERS! BONGOS! MILKMAIDS! JUGS!