phlegm

/flɛm/
noun
  1. Thick mucus produced in the nose and throat, especially when you are sick.
    • He coughed up a lot of phlegm during his cold.
    • Drinking warm tea can help loosen phlegm in your chest.
    • The doctor asked if the phlegm was clear or yellow.
  2. A calm, unemotional way of behaving; lack of excitement or worry.
    • His phlegm under pressure impressed the whole team.
    • The teacher's phlegm kept the nervous students calm.
    • She faced the crisis with remarkable phlegm.
Antonyms
What does "phlegm" mean? | whatsthatwordmean | whatsthatwordmean