Her house is as clean as a whistle.

He decided to blow the whistle on the corrupt practices in the company.

The whistling swan is a large white swan that is native to North America.

Whistle-blowers play a crucial role in exposing corruption and wrongdoing.

I saw a whistling marmot in the mountains.

The whistling swans flew gracefully across the lake.

He blew the whistle to signal the end of the game.

He blows the whistle to start the game.

He has blown the whistle on corruption in the company.

He is blowing the whistle to alert everyone.