"irreverent" in the adjective sense
1. irreverent
showing lack of due respect or veneration
"irreverent scholars mocking sacred things"
"noisy irreverent tourists"
2. impertinent, irreverent, pert, saucy
characterized by a lightly pert and exuberant quality
"a certain irreverent gaiety and ease of manner"
3. godless, irreverent
not revering god
Source: WordNet® (An amazing lexical database of English)
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