one's own style; one's own way
Refers to a personal, self-taught, or idiosyncratic method or approach, often contrasted with formal or standard ways. Similar to 我流, but 自分流 can sound slightly less assertive or more neutral.
See also: 我流
I cook in my own way.
His own way of doing things worked surprisingly well.
Compound of 自分 (self) and 流 (style, school). The exact historical derivation is uncertain, but it follows a common pattern for expressing a personal approach.