* Literal meaning (injury): The cut on my knee finally formed a scab after a week.
* Figurative meaning (strikebreaker): During the strike, the company hired scabs to keep the factory running.
* Figurative meaning (unpleasant person): He's such a scab for gossiping about his friends behind their backs.
Remember that the word "scab" can be considered offensive when used in its figurative meanings, particularly in the context of labor disputes. It's important to be aware of the potential for offense when using this word.