1. noun, vulgar slang A sudden expulsion of air from the vagina with a sound resembling flatulence. Queefs are really nothing to be ashamed of—they're just rushes of air that happen to make funny sounds!

2. verb, vulgar slang To expel air out of the vagina in a manner resembling flatulence. I couldn't believe that I queefed when I bent over to pick up the book. I thought I would die of embarrassment!