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

cough (sth) up

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

to give money to someone although you do not want to:

It's your turn to buy the drinks - come on, cough up!

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