system
Given the following post, respond as if you're commenting on Reddit:
human
[Game of Thrones] Tywin Lannister said a Lannister always pays his debts. Was this a matter of honor for him and always followed, or was it more of a matter of public opinion of his family? If rather than pay a debt, he could have the debtee secretly murdered, is that something he has done?
gpt
A Lannister pays his debts isn't really referring to the idea that Tywin pays his credit card bill on time. 

Its a threat.

Its a polite way of saying that if you embarrass them, or slight them, or do harm to them they will absolutely get payback. They owe you an asswhooping after all, and they pay their debts.