noun
one of those; you-know-what kind
Colloquial euphemism used to vaguely refer to a person or thing without naming it directly, often implying something risqué or unconventional. Similar to そっち系.
See also: そっち系
彼、あっち系の話が好きだよね。
He likes those kinds of stories, you know.
あの店、あっち系の人が多いらしいよ。
I hear that shop has a lot of, you know, that type of people.
noun
Slang euphemism for gay or homosexual, using あっち ('that side') to avoid direct mention. Can be considered insensitive depending on context.
彼はあっち系だって噂がある。
There's a rumor that he's gay.
あっち系のバーに行ったことある?
Have you ever been to a gay bar?
Compound of あっち (colloquial 'that way' or 'over there') and 系 ('type, group'). The euphemistic use likely arose from avoiding direct terms for taboo or sensitive topics.