boys' high school
Abbreviation of 男子高等学校. Used in casual and informal contexts.
He attends a local boys' high school.
女子高 is a high school for girls, while 男子高 is the equivalent term for a boys' high school.
male high school student; boys' high school student
Abbreviation of 男子高等学校 (だんしこうとうがっこう), literally 'boys' high school'.