(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
Lelia	-	Italian
Ikenna	-	Western African, Igbo
Rutendo	-	Southern African, Shona
Cliff	[klif]
Zebadiah	zeb-ə-DIE-ə (English)	Biblical
Nikon	-	Ancient Greek, Russian