He has gone completely gaga.是什么意思？

He has gone completely gaga.

他完全老糊涂了。

he

pron. 他，它，一个人；n. 雄性动物；

例句
Logic had prevailed and he had abandoned the idea.
最终理智占了上风，他打消了那个念头。

has

v. 有( have的第三人称单数 )，（亲属关系中）接受，拿，买到；

例句
...the operation a patient has had.
病人做过的手术

gone

adj. 过去的，用完了，死去的，无望的，无可挽救的；v. go的过去分词；

例句
We have seen this as an attempt to place the blame for a policy that has gone adrift.
我们已经认识到，这是把责任归咎于一项已偏离方向的政策的一种企图。

completely

adv. 完全地，完整地，完全，彻底，全部，一干二净，很，非常，充分，十分，万分；

例句
...a second career which absorbed her more completely than her acting ever had.
比演艺生涯更让她投入的又一职业

gaga

adj. 糊涂的，狂热的；

例句
My daughter is just gaga over men with hairy chests.
我女儿就是痴迷于那些胸毛浓密的男子。