Definitions:

1. clear out the chest and lungs verb
   • This drug expectorates quickly
2. discharge, phlegm or sputum, from the lungs and out of the mouth by coughing verb
   • It is considered impolite to expectorate on the street.

Synonyms:

• clear out
• cough out
• cough up
• drive out
• spit out
• spit up