From what I gather, Okuu has realized that her spelling is so horrible she's just offended her master. She can't tell her さ from her ち, and this has spelled Satori's name, 『さとり』, as 『ちとり』 (Chitori). She probably misspelled the honorific 『さま』as well, writing 『ちまえ』. Unfortunately, I have no idea what it all might mean. Maybe slang?
Orin's just trying to ease the mood... And not succeeding either.