noun
male demographic aged 50 and older
Marketing term for men in their 50s and beyond, often used in media and advertising targeting this age group.
この番組はＭ３層をターゲットにしている。
This program targets the male demographic aged 50 and older.
From English 'M3', where 'M' stands for 'male' and '3' represents the third age group (50+). The term is used in Japanese marketing contexts.