non compos mentis
adj[pred 作表语]
(Latin 拉)
1 (law 律) not legally responsible because of insanity (因精神失常)不负法律责任.
2 (infml 口) not able to think clearly 头脑不清醒; 糊涂
I had had a few beers and was completely non compos mentis. 我喝了些啤酒就头昏脑胀了.
Though my aunt pursued what was, in those days, an enlightened policy, in that she never allowed her domestic staff to work more than eight hours a day, she was extremely difficult to please.