Irreverent means showing a cheerful lack of respect. An irreverent tone, irreverent humour, irreverent about everything.
It is nearly always a compliment in modern use, particularly about comedy, and it names a refusal to be solemn rather than an intent to offend. The reverent it negates is genuine deep respect.
1adjectiveirreverentShowing a cheerful lack of respect.
“The comedian's irreverent jokes about the royal family made the audience laugh.”
irreverent is a quality.
Latin irreverens is in-, not, plus reverens, from revereri, to stand in awe of.
Latin
irreverēns
English, today
irreverent
From Latin irreverēns. by surface analysis, ir- + reverent.
Etymology from Wiktionary, CC BY-SA