herbivore man; man not assertive in romance or career
A Japanese social label for men who are gentle, unaggressive, and not driven by traditional masculine competitiveness, especially in dating and work. Often contrasted with 肉食系男子 (carnivore man).
See also: 草食男子 (そうしょくだんし)
It is said that herbivore men have been increasing lately.
He is a herbivore man and doesn't actively ask people out on dates.