Can be anything: shampoo, lipstick, deodorant, etc.
My newest hate is the money I wasted on L'Oreal Vive Pro shampoo & conditioner. I have to have a fairly thick and moisturizing shampoo and conditioner, but this stuff felt like pure silicone. My hair was so limp and greasy. And I hated the smell - hard to peg, but it was kind of like stale candy.