He hullooed at the top of his lungs.

The hulloos in the garden are blooming beautifully.

She hulloos her friends every morning.

The hullooings echoed through the forest.

Hulloo, is anyone there?

He hulloos to his friend from across the street.

The children were hullooing with excitement as they played in the park.

The hullooing of the crowd could be heard from miles away.