The children hubbubbed loudly in the playground.

She was hubbubbing around the room, trying to find her lost keys.

The Hubbert curves show the projected production of oil over time.

The Hubbert curve is a mathematical model that describes the production rate of a resource over time.

The market was filled with colorful hubble-bubbles.

The children blew hubble bubbles in the park.

The Mother Hubbards gathered for their annual reunion.

The hubbuboos in the park were causing a lot of noise.

The hubbuboo in the pub was deafening.

Hubay is a common surname in Hungary.