For the last few years, the Japanese media have been dishing out label after label in an attempt to describe the modern Japanese male. The latest tag they've pinned on these much-analyzed specimens is the term zesshoku-kei danshi. Literally, “fasting guys,” these are guys so uninterested in women that they don’t even – gasp – have a favorite female TV talent or idol.

The moniker is a play on sōshoku-kei danshi, a phrase coined by the media a few years ago. These so-called “herbivore guys” preferred, like the fabled brontosaurus, to graze peacefully. Which is to say, they showed little ambition in romance, or likely their careers, either. The term proved to be a big hit, resulting in a whole glossary of hilarious spin-off words (see below). But the fasting guys make the herbivores look downright ambitious. In fact, some women have taken a liking to the gentle herbivores and the term has become a lot more neutral than its original critical tone.

Fasting guys exploded on the internet around the end of last year, following a survey of single men released by marriage match-making company O-net. The results were published on sites like Nico News and were subsequently tweeted like mad.