Meaning

1. to scratch (rub a surface with a sharp, pointy rough object, especially to remove itching)
2. to scratch (rub a surface with a sharp, pointy rough object, especially to remove itching)
3. to scratch, to be scratchy or itchy (to cause itching)
4. to scratch (mark a surface with a sharp object)
5. (colloquial) to annoy, to bother
6. (slang) to jack, mooch, steal