This informal meaning refers to forcefully bringing stomach contents out through the mouth.
The passenger leaned over the side and spewed.
The smell made him feel as though he might spew.
This meaning refers to releasing liquid, gas, smoke, ash, or another substance rapidly and in large quantities.
The volcano spewed ash into the sky.
The broken pipe spewed water across the floor.
This environmental meaning refers to releasing harmful gas, chemicals, waste, or particles in large amounts.
Old engines spew harmful gases.
The factory spewed waste into the river.
This figurative meaning refers to producing offensive, false, angry, or excessive speech or writing.
The account spewed false claims all day.
He spewed insults at the officials.
As a noun, spew refers to vomit or a mass of liquid, smoke, or other matter that has been ejected.
The crew cleaned the spew from the deck.
A dark spew of smoke rose from the engine.