Definition of pay up:
(v) :
to pay for something in total, after a certain amount of time after receiving a purchase
"I haven't received the money for a week, so it's time to pay up now."
Definition of pay up:
(v) :
to pay for something in total, after a certain amount of time after receiving a purchase
"I haven't received the money for a week, so it's time to pay up now."