frivolous
Pronunciation:
/ˈfɹɪv.əl.əs//ˈfɹɪv.əl.əs/adjective
Definitions
Silly, especially at an inappropriate time or in an inappropriate manner.
Of little weight or importance; not worth notice; slight.
(said of a lawsuit) Having no reasonable prospect of success because its claim is without merit, lacking a supporting legal or factual basis, while the filing party is, or should be, aware of this.