Wiktionary
yaller dog
n. 1 (eye dialect of yellow dog English) (gloss: worthless item) 2 (eye dialect of yellow dog English) (gloss: Carolina dog)
Usage examples of "yaller dog".
You show me twenty-five dollars or I'll take it out from under you on my bid, you yaller dog!
If I had a yaller dog that didn't know no more than a person's conscience does I would pison him.
CORTEZ, PIZARRO, and WALKER were one-horse fillibusters--COLUMBUS was a four-horse team fillibuster, and a large yaller dog under the waggin.
This part of the Texas Hill Country has ghosts thicker than fleas on an ol' yaller dog.