What does 貸し mean?
貸し is a Japanese noun meaning “loan, lending” in English. It can also be translated as “favor, creditor” depending on context. It is written as 貸し in kanji, かし in hiragana, and kashi in romaji. This word is part of JLPT N3 vocabulary.
Example sentence
でも、これで１つ貸しだね。
But you're going to owe me one.