Failing that, try the "open-mouth threat" - make an o with your mouth, lean forward and raise your eyebrows.

如果不行，尝试“张嘴恐吓法”-做出一个O的嘴型，(身体)向前倾斜并扬起你的眉毛。

youdao

He pushed the barrel of the gun into the other man's open mouth.

他把枪管插入另一个人张开着的嘴里。

《柯林斯英汉双解大词典》

He was breathing through his open mouth.

他张着嘴呼吸。

《牛津词典》

Dubbed "the portrait of a soul" and "the face that launched 1, 000 therapists, " "The Scream" depicts a distorted human figure -- hands flat against its sunken face, eyes and mouth wide open -- in the foreground of a nightmarish landscape.

CNN: 'The Scream' sold for nearly $120 million

It was suggested a channel could be cut through a spit to re-open the harbour mouth.

BBC: Sussex beach erosion 'threatens' Pagham homes

When one of the orang-utans displayed an open, gaping mouth, its playmate would often display the same expression less than half a second later.

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