extreme eroticism; something very erotic
Slangy compound of 極 (extreme) and エロ (erotic). Used in casual contexts to describe highly sexual content or situations.
This manga is so extremely erotic that it's 18+.
His stories are always extremely erotic, and I get embarrassed listening to them.
Compound of 極 (きょく, 'extreme') and エロ, an abbreviation of エロチック (erotic).