Meaning of “cough sth up” - Learner’s Dictionary

cough sth up

phrasal verb with cough us uk /kɒf/ verb [ I ]

to make something come out of your lungs or throat by coughing:

Doctors were worried when she started coughing up blood.

(Definition of “cough sth up phrasal verb, verb” from the Cambridge Learner’s Dictionary © Cambridge University Press)