A queef occurs when air is expelled from the vagina, often making a sound similar to flatulence. Unlike what's most commonly called a "fart," what is expelled as a queef is simply air and not intestinal gas. When air gets in it must come out, so queefs are most common during intercourse or during certain physical activities like yoga and pilates. During intercourse, the further the penis is withdrawn, the more likely it is that air will be forced out when the penis is thrust back in, leading to a queef. Certain sex positions can also trigger more queefing for some people.
During yoga or pilates, queefs most often occur when coming out of positions where the legs are spread wide to allow air into the vagina, such as a wide-legged forward bend or an inverted pose like shoulder stand.
A queef is also known as a vaginal fart, pussy fart or vart. It may also be called a vegan fart or a fanny fart.