From Longman Dictionary of Contemporary Englishscabscab /skæb/ noun [countable] 1 MIa hard layer of dried blood that forms over a cut or wound while it is getting better2 BELan insulting word for someone who works while the other people in the same factory, office etc are on strike
Examples from the Corpus
scab• Until the healing process is well advanced, the body forms a scab over the wound to protect it.• He is a scab on the play, a scab speaking prose.• Cuts and grazes on the skin should be covered with a waterproof dressing until a scab forms.• Cindy Crawford has said her job is hard because frequent swimsuit changing leads to callouses and scabs.• This country is set up for scabs.• There were scabs on his elbow and hand, and his nose appeared a little off-center.From Longman Business Dictionaryscabscab /skæb/ noun [countable] an insulting word for someone who works when other people in the same factory, office etc are on strikeOrigin scab (1200-1300) Old Norse skabb 