Originally used within the kid's television cartoon series "Flintstones Kids" middle 10 minute featurette "Captain Caveman", this term is used as a descriptor for very startling observances and interactions: In most cases, gigantic, fat and ugly girls.
Most famously used in the phrase
UNGABUNGA CAPTAIN CAVEMAN!(obvious statement here)!
JEEZ look at the face on that... UNGA BUNGA dude!
Holy Ungabunga! she got run over by the stupid bus after falling out of the fattree...
A citizen of a very backward and primitive nation, more often than not African. Ofttimes they have arrived in a modern technologically advanced nation and are not yet house-trained.
The house fire was believed to have been started by some Ungabungas roasting a goat on the floor in the middle of the lounge