1, which means the bottom line and the lower limit in network language; In most cases, the internet often says "one place is broken" or "one place is broken", describing this person's thoughts, language and behavior as extremely obscene, reckless and bottomless.

2. As an extension of the original explanation, moral integrity is often quoted by ACGN culture lovers or network communication. It is often used in situations where the other party has made an excessive joke and the other party has said something rather ugly. What is "excessive" and "out of line" depends on the audience's moral bottom line.