"spew out" is correct and usable in written English.
It is a phrasal verb meaning to "say a large amount of something all at once". For example, "The angry customer spewed out a string of insults to the waiter."
Europa, too, may spew out water on occasion.
He loves the machines that spew out papers.
Printing presses were ready to spew out the 1,000-page 1,000-page.
Deadpan characters spew out lengthy standup soliloquies in crimped cul-de-sacs.
Taxis waste gasoline, and needlessly spew out fumes, as they cruise for fares.
The familiar explanation is fear of the poison that Hoover would spew out in response.
The crystals, in turn, spew out a stream of entangled photons.
But Ebola disarms the cell and uses this crucial bodily defender as a factory to spew out its progeny.
High-frequency traders, some of them billion-dollar outfits, spew out and retract many buy and sell orders every millisecond.
Gas-powered electricity generators have plenty of spare capacity and spew out much less carbon dioxide than coal stations.
Having cut the throat of shame, the male and female singers spew out their sweating, broken, defiant hearts.
