The idiom describes sitting up straight.

Straighten your clothes and sit upright-serious.

Explain lapels: lapels; Sitting in danger: sit up straight. Get dressed and sit up straight. Describe a serious or reserved look.

From Sima Qian's Historical Records Biography of Japanese in the Western Han Dynasty: "Zhong Song and Jia Yiqu knew that they were in danger."

Zhong Song and Jia Yi suddenly woke up and sat respectfully and seriously.

Mr. Example invited me to sit in a plush chair on the upper floor and started a conversation with me.

Grammar as predicate, attribute and adverbial

Synonyms are serious, unsmiling, sitting still, sitting still, sitting in awe.

The antonym is shaking your head to show dignity, neither fish nor fowl, fooling around, no three no four, shaking your head, fooling around.

Extended data

1, synonymous with sitting tight.

Sit in danger armed to the teeth.

Explain dangerous sitting posture: sit up straight. Pack your clothes and sit up straight. Describe a serious or reserved look.

The source of Li Tang Yanshou's Biography of Northern History Su Chuo: "Zhou Wensheng, in danger of clothes, has no knee feeling before."

Emperor Wen of Zhou got up and sat tight, not feeling the front seat of his knee.

Wenwen sat in the teacher's office in a dangerous suit and answered the teacher's questions seriously.

Grammar as predicate, attribute and adverbial

2. The antonym of sitting in danger

neither fish nor foul

Explain neither fish nor fowl: different kinds. It is neither this category nor that category, and it is described as unreasonable or unreasonable.

From Wu Ming Bing's Curing Furnace Soup Capture Shadow: "The people in the eyes are neither fish nor fowl, and the people in the trap are neither ridiculous nor sharp."

The people in the eyes are deformed, and the people in the pit are embarrassed and unclear.

Interestingly, the child is dressed neither fish nor fowl today.

Grammatical combination; As predicate, attribute and complement; Metaphor is not standardized and deformed.