The structure 没…没…
The structure 没…没… 
is used to form set expressions in colloquial speech. It is used in the following two cases.
The first case is to express someone's inability to distinguish between what is right and what is wrong.
is used to form set expressions in colloquial speech. It is used in the following two cases.
The first case is to express someone's inability to distinguish between what is right and what is wrong.Scheme
没
A
没
B
Pay attention
"A" and "B" are replaced by adjectives with opposite meanings.
Let's look at some examples.
没大没小 is used in relation to someone who behaves inappropriately.
is used in relation to someone who behaves inappropriately. Pay attention
This is due to the importance of hierarchy in Chinese culture. That is, young people should show respect for their elders.
Examples
这孩子说话没大没小的
This child speaks out of turn
zhè háizi shuōhuà méi dà méi xiǎo de
There is another example used to express rudeness and bad manners:
没轻没重
Examples
这丫头，打断我们的谈话，没轻没重的
This girl has no sense of decency at all. She interrupted our conversation
zhè yātou, dǎduàn wǒmen de tánhuà, méi qīng méi zhòng de
The second case is to intensify the meaning.
"A" and "B" can be replaced by nouns, adjectives or verbs with a similar meaning.
Examples
一上午没吃没喝，要饿死了
I'm starving. I haven’t eaten or drunk anything all morning
yí shàngwǔ méi chī méi hē, yào è sǐ le
我讨厌你没完没了的抱怨
I'm sick of your endless complaints
wǒ tǎoyàn nǐ méi wán méi liǎo de bàoyuàn
你真是一个没头没脑的人！
You're such a stupid man!
nĭ zhēnshì yí ge méi tóu méi năo de rén