mantıksız, aptalca

listen to the pronunciation of mantıksız, aptalca
Türkisch - Englisch

Do not give any more cockamamie reasons for failing to complete your assignment.

foolish, silly
{s} crazy, ridiculous, silly, pointless (Slang)
a cockamamie story or excuse is not believable or does not make sense (Probably from decalcomania)
pungent adjectives of disesteem; "gave me a cockamamie reason for not going"; "wore a goofy hat"; "a silly idea"; "some wacky plan for selling more books
mantıksız, aptalca