phlegm 
/ˈflɛm/ noun
/ˈflɛm/ noun [noncount] 1 : a thick, yellowish liquid that is produced in the nose and throat especially when a person has a cold 2 literary : calmness in a difficult or unpleasant situation
▪ He displayed remarkable phlegm in very dangerous conditions.
▪ He displayed remarkable phlegm in very dangerous conditions.
— phlegmy /ˈflɛmi/ adjective
▪ a phlegmy cough
/ˈflɛmi/ adjective ▪ a phlegmy cough
