The phrase 'expel air' is correct and usable in written English.
It is most often used to refer to the act of exhaling, as in when a person or animal breathes out. For example, "The dog expelled a deep breath of air after his long run."
Add a pinch of pepper, sugar and salt to each, expel air from the bags, seal.
Hold your breath until just before surfacing; don't expel air coming off the wall, Mr. Cantrell said.
Using red and black lipstick they decorate their faces and transform themselves into warriors; shifting from side to side in unison, they expel air forcefully, thus making it possible to create a new language, or movement as communication.
Drug therapy to reduce or end symptoms, increase physical stamina and reduce the incidence and severity of flare-ups typically involves the use of inhaled bronchodilators to relax bronchial muscles and improve the ability to expel air.
Modern Family is more of a "expel air out of my nose fast with my mouth closed" funny.
Noonan was curious why the mammals would expel air underwater, when there didn't seem to be a practical purpose for doing so. .
Unlike vocalization processes of many other vertebrates, frogs broadcast sound without expelling air.
To clean a room, he said, collapse a panel and the expelled air will blow away dust.
The ballooning dogs expelled air from their bowels; this led frequently — and simultaneously — to defecation, urination, and projectile vomiting.
By collecting all the expelled air, Cooper calculated the volume of oxygen consumed, in relation to body weight.
Mr. Wey is more vigorous, doubling over and expelling air again and again or savagely lunging through space.
