จะ (jà) + Adjective 形容詞 + ไปไหน (pai nǎi)
Meaning: How + Adj!
Literal meaning: How Adj. are you going to get?

จะน่ารักไปไหน
[jà nârák pai nǎi]
= How cute it is! 

จะหล่อไปไหน
[jà làw pai nǎi]
= How handsome he is! 

จะเก่งไปไหน 
[jà gèng pai nǎi]
= How good you are! 

จะขี้เกียจไปไหน
[jà kîi gìat pai nǎi]
= How lazy she is! 

Note that the subject is often dropped in this structure. And without a context, the subject can be anything. You need to know the context to know who is being referred to.

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