Adverb
In an irreverent manner.
Source: Webster's dictionaryin the seventeenth century England had known fifty years of doctrinal quarrels and civil war; clergymen had been turned from their cures, and churches irreverently used Source: Internet
the student irreverently mimicked the teacher in his presence Source: Internet
She charged that Knox spoke irreverently of the Queen in order to make her appear contemptible to her subjects. Source: Internet
This third group took astrology seriously, possibly as a sacred canopy, whereas the other two groups took it playfully and irreverently. Source: Internet