A cross between the word phew and oof. A language based outlet for overcoming spontaneous emotion.
Charlie says: My genitals are huge, want to see?
Belly Boo says: Yes alright.. Phwoof! That's massive!
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Pronounced /fwoอof/:
The sound of an air pocket escaping the vagina immediately following penitration.
Yeah man I was bangin this chick from the back last night and she totally phwoofed.