Brow wiper's sigh

• Expression of relief
• Relieved reaction
• "Close one!"
• 'Close call!'
• "Boy, I'm glad that's over!"
• "Thank heaven that's over!"
• "That was a close call!"
• Exclamation of relief
• "Boy, is it hot!"

The Collaborative International Dictionary Word definitions in The Collaborative International Dictionary
Whew \Whew\, v. i. To whistle with a shrill pipe, like a plover. [Prov. Eng. & Scot.]