break out in a rashとは意味:ブツブツができる、急に発疹ができる break out in a rash meaning:[American slang] [for the skin] to erupt with a rash. (See also break out in a cold sweat ; break out (with a rash) ) I knew Dan had the chicken pox, because he broke out in a rash and ...break out in a rash en francais:avoir une éruption cutanée (alergie), avoir des rougeurs (peau), avoir une réaction allergique=