noun which may take the genitive case particle 'no', noun
Slang term used to describe something sexually suggestive or titillating, often in a playful or lighthearted way. Can modify nouns with の.
See also: エッチ
その漫画、ちょっとえちえちなシーンが多いよね。
That manga has a lot of slightly lewd scenes, doesn't it?
彼女のインスタはえちえちな写真ばかりだ。
Her Instagram is full of sexy photos.
noun
sex; sexual activity
Slang noun referring to sexual intercourse or sexual activity. Derived from エッチ (H), which itself comes from the first letter of 変態 (hentai).
See also: エッチ
昨日、彼氏とえちえちした。
I had sex with my boyfriend yesterday.
えちえちは週に何回くらいするの？
How many times a week do you have sex?