What do they mean when they say, “It’s written with a pitchfork” (see below)?

This phrase is often used to describe writing that is very rough or unpolished. It suggests that the writing was done in a hurried or careless manner, as if it were written with a pitchfork instead of a pen or pencil. The phrase is usually used to indicate that the writing is of a low quality and needs to be improved. In other words, it implies that the writing is not up to the standards expected of a professional writer.