Definition
To say that someone will never hear the end of something means that the person will repeatedly talk about it, either proudly or disapprovingly.
永無學日，永遠聽他/她喃囉不停（形容很喜歡顯擺或批評人的樣子）
If he wins the competition, you will never hear the end of it.
如果他贏得比賽，你將會一直聽到這件事。
I'm sure I'll never hear the end of it from her once she knows I made a mistake.
我確定一旦她知道我犯了錯，我將會一直聽到這件事。
Once he starts talking about his new car, you'll absolutely never hear the end of it.
一旦他開始談論他的新車，你絕對會一直聽到這件事。