"He’s lost his vertical hold" nghĩa là gì?

"He’s lost his vertical hold" = không giữ được tư thế thẳng đứng -> nghĩa là ngây ngô, điên khùng.

Ví dụ

He dances out in the street when it rains and he's lost his vertical hold, he needs to be locked up.

And this was after my client already told him, no, he's lost his vertical hold, he's a loose cannon, I don't want to deal with him.

I was running in the snow, just to get my conditioning in, and people on the side of the road were like, he's lost his vertical hold.

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