Hero Cat Thongs -- Owner: My Pussycat Ain't Selling Thongs

Hero Cat is on the attack again, but instead of a dog ... this time she's taking down a thong bearing her now famous nickname.

The owners of Tara -- aka Hero Cat -- tell us a friend of theirs opened a web store to help them capitalize on the national craze, but they had no idea the gear would include a thong with a paw right over the kitty zone.

Erica Triantafilo says she was shocked to see "Hero Cat" slapped on lingerie because she feels it's a bad example for kids -- so she went on a panty raid ... shutting down not only the thongs, but the whole online shop by Friday afternoon.