Where did pagnganganga originate?

The term "pagnganganga" is a Tagalog word that means "to yawn." It's a common human behavior and therefore doesn't have a specific origin place.

Yawning itself is a physiological reflex that occurs in all mammals, birds, reptiles, and even fish. It is believed to be a mechanism for regulating brain temperature and increasing alertness.

Perhaps you are asking about a specific cultural or historical context related to yawning? If you can provide more details about what you are interested in, I can assist you better!