■ verb
1》 expel air from the lungs with a sudden sharp sound.
2》 (of an engine) make a sudden harsh noise, especially as a sign of malfunction.
3》 ( ~ up ) informal give something, especially money, reluctantly.
↘ Brit. reveal information; confess.
■ noun an act or sound of ~ing.
↘a condition of the respiratory organs causing ~ing.
Derivatives
~er noun
Origin
ME: of imitative origin.