unserious

American  

[uhn-seer-ee-uhs] / ˌʌnˈsɪər i əs /

adjective

1. not serious; not earnest, weighty, or grave.

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Example Sentences

"Anybody who saw Alan in the Traitors knows he's completely unserious," she says.

From BBC

"Employers did say that they have not had any issues ordering provisions, so the seafarers that have contacted us must be on vessels with unserious employers."

From Barron's

“It’s a fundamentally unserious report.”

From Los Angeles Times

With a love for the old-school sound of the 1990s, Leo manages to weave together her flirty, unserious humor with vintage romance, writing songs that’ll either validate your heartbreak over a bad ex or have you ready to dance it off and forget they ever existed.

From Los Angeles Times

In my case, the confession didn’t make me look careless or unserious.

From The Wall Street Journal