Sound made while wiping away forehead sweat

• "Is it ever hot today!"
• Phil's number one cut - that was close!
• [What a relief!]
• "That stinks!"
• Relief indicator
• ''That was close!''
• 'That's a relief!'

Longman Dictionary of Contemporary English Word definitions in Longman Dictionary of Contemporary English
interjection EXAMPLES FROM OTHER ENTRIES ▪ Phew ! I am so glad it's Friday.

Wikipedia Word definitions in Wikipedia
Phew may refer to: Phew (singer) , a Japanese vocalist King Phew, a character from The Illmoor Chronicles Kung Phews, a race originating from Chi Fang from the video game Serious Sam II Phew, 1974 solo album by Claudia Lennear