Well, if you happen to learn Japanese, you would be sure how roundabout this language is. Yes, we Japanese tend to say things ambiguously at times when we are not willing to tell directly. But actually such Japanese would become convinient somehow wherever you place yourself. At any rate, this term is kinda useful. Whether you live in the otaku circle or not doesn’t matter. But know this term varies the meaning depending upon the context…
So breifly, そっち[socchi] means the other way of it, the opposite of it…something different from what you say or like. Also, this could imply something you are not willing to say. Ugh, I can’t explain well. Anyway, I shall write down some examples…
1. A: 俺、ツンデレ萌えなんだ。 だから涼宮ハルヒとか惣流アスカラングレーが好きなんだ。お前は？[I have a tsundere-moe, so I love Suzumiya Haruhi and Souryu Asuka Langley. What about you?]
B: えっと、俺は言葉様とか竜宮レナが好き…[Well, I love Kotonoha-sama and Ryuguu Rena…]
A: もしかしてお前、そっち系？[Don’t tell me that you belong to…socchi-kei?]
B: うん、そっち系。[Yeah, right.]
In this context, this そっち系 obviously means a yandere-moe.
2. A: やっぱり死種ならディアイザよね。[Among those characters from Gundam Seed, it should be definitely Dearka ×Yzak, right?]
B: えー、あんたってそっち系なの？あたしはイザディアなんだけど。[Geez, are you in love that socchi-kei? I love Yzak ×Dearka, though.]
As you can see, this conversation takes place between two fujoshis. In this way, if your friend loves the switched pair of your favorite pair, you could say そっち系 to mean that pair.
3. A: 君、かわいいね。抱きしめてもいい？[Hey, you are so adorable. Can I hug you?]
B: え…あの、僕、男ですけど…[Er…well, I am a man, though.]
A: わかってるよ。[I know.]
B: あの…もしかして、そっち系ですか？[Well, are you…socchi-kei?]
Yes, this socchi-kei means a gay.
4. A: おい、ちょっとあの人見ろよ。小指無いよ。[Hey, look at that man. He doesn’t have a pinky.]
B:本当だ。やっぱりそっち系かな。[He doesn’t. Is he…socchi-kei?]
In this context, it means a yakuza (Japanese mafia). In the yakuza society, they shall cut down your pinky to show your apology or merely as a punishment. This is エンコ詰め[enko dsume]. エンコ means a pinky here.
In this way, そっち系 is used a lot lately anywhere. So make this そっち系 as your own language!🙂