smitty
 n.— «If you had a car, and it sounded nice, and it was low to the ground. The ideal would be the Smitty muffler. The guys were going after the Smitty sound in that day.» —“Carrying On The Cruising Tradition, Customized For The 21St Century In Maine Town, Summer Is Also The Season Of ‘Repetitive Driving’” by Ellen Barry in Old Orchard Beach, Maine Boston Globe Aug. 12, 2001. (source: Double-Tongued Dictionary)