SEATTLE – Officially it’s the South Lake Union Streetcar, but people in the Cascade neighborhood who are fed up with construction noise and detours have come up with a name that's a little more provocative.

Instead of a streetcar, they're using the word trolley, and also the acronym “SLUT.”

At Kapow! Coffee on Harrison Street, 100 T-shirts with "Ride the SLUT" across the front quickly sold out and more are on order.

Streetcar officials say it's always been referred to as a streetcar, never a trolley.

Tracks have been laid from downtown along Westlake Avenue to Lake Union. Testing of the the $50.5 million system is scheduled to being in October and the line should be up and running in December.

Westlake Avenue was recently converted from one-way to two-way to accommodate the streetcar.