Grammar Tip of the Day (No. 287) from wordsmith.org
facetious (fuh-SEE-shus) adjective
Jocular or humorous, often inappropriately. [From Latin facetus (witty).]
"Prof Bailey is particularly incensed that in some cases, the presiding judge makes facetious comments which trivialise the issue."
Barbara Gloudon; Of Bling and School Uniforms; Jamaica Observer; Mar 23, 2007.