Here's the context: a loan shark has asked a yakuza to help him collect a loan. The yakuza came back with the money. The loan shark paid for the yakuza's trouble and then tried to give the yakuza a little extra but the yakuza was reluctant. Then the loan shark said:
source: 龍が如く0 誓いの場所 第一話, can be seen here on youtube at around 4:45 min.
I have no idea what サマ means. Could be slang or something since I can't find it in dictionaries. What is it and how does it work here?