unweighty
/ʌnˈweɪtɪ/Definitions
1. adjective
lacking weight or seriousness; frivolous
“The unweighty remarks made by the comedian at the awards show received mixed reactions from the audience.”
2. noun
a person or thing that is unweighty; something lacking in weight or seriousness
“The unweighty nature of the comedy sketch was a surprise to the audience.”