Meaning of A-tas

Recently I just realise that a new word has appeared onto my radar. 'A-tas' ... i slowly realise that it means high-class (in a perjorative sense), as in "oh, that person is so a-tas, she doesn't even want to take the bus.' But the question is where did it come from? I only heard of this word last year from a classmate and she laughed when i said that i have never heard of it before. Now it seems to be everywhere - cognitive dissonance? Once i know of its exisitence, i notice it everywhere.

So where is the word 'a-tas' derived from? A malay word? *pause for 1 min* .. back from my fact-finding mission (aka google). atas IS a malay word - meaning 'above' which makes perfect sense now.

atas - malay for above, which is also Singaporean slang for high-class. How interesting!