金かな釘くぎ

noun

iron nail; metal nail

Literal meaning: a nail made of metal, typically iron. Used in everyday contexts.

• 金かな釘くぎを板いたに打うち込こむ。

  I drive an iron nail into the board.

noun

scrawl; scrawled writing

Abbreviation of 金釘流 (かなくぎりゅう), referring to messy, scratchy handwriting that resembles the marks of a nail. Used humorously or self-deprecatingly.

See also: 金釘流

• 彼かれの字じはまるで金かな釘くぎだ。

  His handwriting is just like a scrawl.

• 「金かな釘くぎ流りゅう」を略りゃくして「金かな釘くぎ」と言いうことがある。

  Sometimes 金釘流 is abbreviated to 金釘.