리플 means a reply or a comment. Some might think that 'Wow! They both sound similar!!' Well, 리플 came from reply. hahaha. We just don't have 'r' sound in Korean letter, so we pronounce it as 'liple.'
To leave a comment is 리플 달다(literally means hang a reply).
You can say 리플 달아주세요(Please leave comments.) on your posts.
So...everyone who is looking at this, 리플 달아주세요! lol.
Only people who leave comments will have an opportunity to be held tight like this! lol.
You can also use 댓글(Deat-geul) instead of 리플. They are both the same.
2) 악플 (Akple)
악플 is a bad comment or a vicious comment. 악 means 'bad.' 플 is from 리플.
You will use this in 악플금지(No bad comments), 악플은 삼가해주세요(Please abstain from leaving bad comments).
3) 무플 (Moople)
무플 means no comments. 무 means nothing, and again, 플 is from 리플.
People use this in 무플 절망(literally means no reply despair).
This means if you don't leave any comments, this will throw me into despair. This is used next to the title of a post.