'Shark Tank' Star Barbara Corcoran -- Taylor Swift Got RIPPED OFF in Rhode Island Mansion Deal

If Taylor Swift seems a little more like a black superhero this morning, it's because she got the SHAFT in her $17 million Rhode Island mansion ... this according to "Shark Tank" star Barbara Corcoran.

Barbara -- a stone cold PIMP in the New York real estate scene -- was at a small business summit at the Omni in D.C. when we asked if Swift got ripped off when she purchased a massive 11k+ square-foot mansion in the Ocean State.

Barbara's response? Let's just say this shark can bite.