Meaning of guāi guāi:
guāi guāi
乖乖
Adjective
(of a child) well-behaved
Zhège háizi hěn guāiguāi, cóng bù rě máfan.
这个孩子很乖乖，从不惹麻烦。
This child is very well-behaved and never causes trouble.
Adverb
obediently
Xiǎo gǒu zuò zài nàr, guāi guāi de tīnghuà.
小狗坐在那儿，乖乖地听话。
The puppy sits there obediently listening.
Noun
(term of endearment for a child) darling; sweetie
Māma duì háizi shuō: “Guāiguāi, lái chī zǎocān!”
妈妈对孩子说：“乖乖，来吃早餐！”
The mother said to the child, "Darling, come and eat breakfast!"
Xiǎo māo mī zhēn shì guāi guāi.
小猫咪真是乖乖。
The little kitten is really a sweetie.
Interjection
goodness gracious!; oh my lord!
Tīng dào zhège xiāoxī, wǒ zhǐhǎo shuō guāi guai!
听到这个消息，我只好说乖乖！
Upon hearing the news, all I could say was, goodness gracious!
Tā de biǎoxiàn zhēn shì guāi guai!
他的表现真是乖乖！
His performance was truly amazing!
