When you click on the word "Biography" on the Giddy Motors Web site, you're taken to a page that says simply "There are three of us." But the pranks don't stop there. Click on "News," and you're whisked away to the BBC News home page; click on "Nothing" and it takes you to, well, you guessed it. Not that you need to be acquainted with the intimate details of this English noise-punk trio to fully appreciate its music. All you need to know is that Gaverick de Vis sings and plays guitar; Manu Ros plays drums; Gordon Ashdown plays bass -- and their collective sonic blitzkrieg will most likely render your ass irreparably kicked. On the Motors' 2002 full-length debut, Make It Pop, coils of contorted guitar are wound around a dense, jazzy core; rhythms heave and shudder like seismic tantrums. De Vis sounds like the Cows' Shannon Selberg eating the Fall's Mark E. Smith alive as he belts out a cacophonic fugue of grunts, whoops, wolf howls and birdcalls. Produced by Steve Albini, the album traces an aesthetic lineage from the Birthday Party on up through U.S. Maple; though some songs seem to be barfing up the abrasive belligerence of Nirvana's most anti-pop moments. So is Giddy Motors (playing Saturday, August 9, at the 15th Street Tavern) a riddle wrapped in a mystery inside an enigma? Nah, more like a fist wrapped in raw meat inside a tank full of piranhas.