the quality of not showing the expected respect for official, important, or holy things

The book is written with good humour and irreverence. 这本书是用幽默和不敬的口吻写就的。

Such behaviour is typical of the cheeky irreverence the band display onstage. 这种行为典型地体现了该乐队在舞台上的厚颜无耻。