形容詞 irreverent:

1. showing lack of due respect or veneration
2. characterized by a lightly pert and exuberant quality
   同義詞：impertinent, pert, saucy
3. not revering god
   同義詞：godless

ir.rev.er.ent

adj.（形容詞）
Lacking or exhibiting a lack of reverence; disrespectful.
不虔誠的；不尊敬的：缺乏或顯出缺乏虔誠的；不尊敬的
Critical of what is generally accepted or respected; satirical:
挖苦的：對廣泛被接受或尊敬的事物挑剔的；嘲諷的：
例句：
irreverent humor.
挖苦性的幽默

【引伸】
irrev.erently
adv.（副詞）