I'm sure that's what it is. What is the significance of Oreng-ao? Please edumacate :) Salamat in advance. 
Hi Bernie, I am still researching myself about this, really. In our Nabloi Group, someone defined the meaning of "Oreng-ao" as the organic scum that gathers in a river downstream. It is the old name of Teachers' Camp. But I am not satisfied with this definition.
By the sound of the word, I could instinctively feel there must be something more to it.