also: えろい
i-adjective
Colloquial adjective describing something sexually suggestive or titillating. Can refer to appearance, behavior, atmosphere, or media.
あの映画はちょっとエロいシーンが多いね。
That movie has a lot of slightly erotic scenes, doesn't it.
彼女の新しい水着、すごくエロいと思わない？
Don't you think her new swimsuit is really sexy?