a/your fairy godmother
1. In children's fairy tales, a woman with magical powers who appears in order to help others in their time of need. Cinderella's fairy godmother helped her get ready for the ball so she could meet Prince Charming.
2. Someone who helps others with their problems, usually providing financial assistance. Thank you so much for helping me with my car repair bill! You are my fairy godmother.
A generous benefactor, as in An anonymous fairy godmother donated the money for the new organ. This expression alludes to a stock character in fairy tales such as Cinderella, who gives unexpected and much needed assistance. [Late 1800s]
a fairy godmother
A fairy godmother is a person, especially a woman, who helps someone a lot. When I began in the business, the woman I regarded as my fairy godmother was Sybil Thorndike. Our country needs a fairy godmother to pay its debts.