From Longman Dictionary of Contemporary Englishasinineas‧i‧nine /ˈæsənaɪn/ adjective STUPID/NOT SENSIBLEextremely stupid or silly SYN ridiculous What an asinine remark!
Examples from the Corpus
asinine• Other bands don't: they eschew the arty deliberations of the underground in favour of an all-out assault upon preconceptions and asinine posturing.• On the other hand, I didn't have to think about it at all to decide it was flamboyant, asinine pretentiousness.• asinine questionsOrigin asinine (1400-1500) Latin asininus “of a donkey”, from asinus; → ASS 