Griffonage
Noun: A crude or illegible scrawl, bad handwriting.
Example: “Most of the postcard was unreadable because of the griffonage.”
If you need a translation of this griffonage email me. It won’t be long before people won’t need to write at all and texting will replace notes and perhaps talking.
I can usually read your griffonage. Did I use that correctly?
Yes you used it correctly but if you can read it it might not be griffonage.