unorthodox kanji reading; folk reading
Refers to a non-standard reading of a kanji, especially in compounds, often based on a common phonetic component rather than the correct on/kun reading. The term literally means 'farmer's reading', implying an uneducated guess. Compare with 慣用読み (conventionalized non-standard reading).
See also: 慣用読み
Reading 輸出 as しゅしゅつ is a kind of unorthodox kanji reading.
An unorthodox reading is when you are misled by a kanji's phonetic component and read it incorrectly.