frivolous

adj. wasteful; petty, trite; silly, foolish; nonsensical; unimportant

Frivolous litigation is a legal claim or defense presented even though the party and the party's legal counsel had reason to know that the claim or defense had no merit. A claim or defense may be frivolous because it had no underlying justification in fact, or because it was not presented with an argument for a reasonable extension or reinterpretation of the law, or because laws are in place unequivocally prohibiting such a claim (see Good Samaritan law).
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Adjective
1. not serious in content or attitude or behavior; "a frivolous novel"; "a frivolous remark"; "a frivolous young woman"
(antonym) serious
(similar) airheaded, dizzy, empty-headed, featherbrained, giddy, light-headed, lightheaded, silly
(see-also) superficial
(attribute) seriousness, earnestness, serious-mindedness, sincerity

(a.)
Of little weight or importance; not worth notice; slight; as, a frivolous argument.
  

(a.)
Given to trifling; marked with unbecoming levity; silly; interested especially in trifling matters.
  

adj.
1. of little weight, worth, or importance
ہلکا, سبکسار, خفيف, چھوٹا, اوچھا, ادني, بے وقعت, بے قدر
2. given to trifling
لغو, بے معني, فضول, واہي, ناچيز, باد ہوائي, بيہودہ
frivolous argument
دليل قياسي, پوچ دليل