moonraking
/ˈmuːnˌreɪkɪŋ/noun
The action of ‘raking’ the moon, or engaging in foolish or unprofitable activity. Chiefly figurative in one's wits are (also have) gone moon-raking: used to indicate that a person has lost his or her reason ( British regional ).
Origin
Mid 19th century; earliest use found in George Croly (1780–1860), writer and Church of England clergyman. From moon + raking.