Short for 明治大学 (Meiji Daigaku, “Meiji University”).

a student (usually of a university, sometimes of a high school)

a younger sibling

one’s own younger brother / a younger male / (Kagoshima) younger brother

younger brother / younger male

(chiefly women's speech) first person singular pronoun: I, me

(polite) first-person singular pronoun: I, me

a personal or private matter / (by extension) selfishness

(formal) first-person singular pronoun: I, me

personal, private / secret