(one's) (hand)writing is like chicken scratch

One's handwriting is very poor, messy, and/or illegible, likened to the marks made in the dirt by a chicken. I can't understand these notes at all, your handwriting is like chicken scratch!

Common Names:

Name	Pronounced	Usage
Hasan	-	Arabic, Turkish, Persian, Urdu, Punjabi, Bengali, Indonesian
Vazha	-	Georgian
Gruffydd	GRIF-idh	Welsh
Govannon	-	Welsh Mythology
Marzanna (1)	-	Polish
Marjan (1)	mahr-YAHN	Dutch