“无聊的”的英语可以翻译为：senseless，bored，tiresome，uninteresting，disappointing ...

他喋喋不休地说着某个无聊的电视连续剧。He was carrying on about some stupid television series.事情变得有点沉闷无聊的时候，不要胆怯。Don't be faint-hearted when things seem a bit slow or boring.会议变成了无聊的扯皮。The meeting degenerated into petty squabbling....