But really they probably mean a minority in a specific career or environment. For example, ~6% of truck drivers are female but only ~18% of primary and secondary teachers are male.
School administrators are overwhelming male: http://aasa.org/SchoolAdministratorArticle.aspx?id=14492
I'm male, and taught K-5 special education for 2.5 years in my first job out of college. Few men join the profession, and many of them leave for better paying jobs, but I think a huge part of it is society's willingness to make raising children women's work. This is the "oh Daddy is babysitting!" phenomenon happening at the professional level.