金かな釘くぎ流りゅう

noun

scrawl; stiff, angular handwriting

Refers to handwriting that is stiff, angular, and hard to read, likened to bent nails. Often used self-deprecatingly or to criticize poor penmanship.

• 彼かれの字じはまるで金かな釘くぎ流りゅうだ。