noun
omnivore type; man who is neither overly aggressive nor overly passive in pursuing sex and riches
A slang term from the 2000s–2010s Japanese dating/relationship discourse, contrasting with 草食系 (herbivore men) and 肉食系 (carnivore men). It describes a man who is flexible and balanced in romantic and material pursuits, not extreme in either direction. The literal meaning is 'omnivore type'.
彼は草食系でも肉食系でもない、いわゆる雑食系だ。
He's neither a herbivore nor a carnivore type; he's what you'd call an omnivore type.
雑食系男子は、状況に応じて積極的にも控えめにもなれる。
Omnivore-type men can be assertive or reserved depending on the situation.
Refers to 'carnivore men' who are assertive and aggressive in pursuing sex and success. 雑食系 is less extreme than this type.
Compound of 雑食 (omnivorous) + 系 (type, group). Coined in Japanese popular culture as part of the '〜系男子' trend, likely influenced by the earlier terms 草食系 and 肉食系.