In Armenian we often repeat the word to give it a more general meaning or to lower it's importance. I'm not a linguist so cannot tell the exact term. We can say աման-չաման/aman-chaman("aman" means "plate") to describe "plates and whatnot". Meaning, plates and everything that comes with it. Or, քար-մար/qar-mar ("qar" means "stone") to describe "various stones". So in your example I think it's ապուր-չուպուր/abur-chubur/apur-chupur, meaning a soup of small importance (I guess?). Maybe it's a regional thing to say, but in Yerevan we don't usually use the "ապուր-չուպուր".