<span class="searchmatch">ㅇㄴ</span> • (annyeong / ani / ono / ana) (Internet slang, text messaging) initialism of 안녕 (annyeong, “hi”) (Internet slang, text messaging) initialism of 아니...
written Korean but is very common in text messaging, perhaps because the initialism <span class="searchmatch">ㅇㄴ</span> for 아니 (ani, “no”) can be easily mistyped as ㅇㅇ for 응 (eung, “yes”)....
<span class="searchmatch">ㅇㄴ</span> 아나 (ana) Possibly a corruption of 아나 (ana), composed of 아 (a, “Ah”, interjection) + 나 (na, “I”, pronoun), as used in phrases like "Argh, I am so mad...