Green’s Dictionary of Slang

(orig. US) an objectionable, unpleasant person; also oneself.

1966		B. Jackson Get Your Ass in the Water (1974) 130: When her soul-fucking days are over and her pussy they no longer buy, / throw you some more brimstone in the furnace and throw her dogass in the fire.
1972		D. Jenkins Semi-Tough 49: Those dog-asses don’t have anybody hurt.
1988		R.R. Moore ‘Signifying Monkey’ 🎵 Now, when you left, the jungle rung / Now you bring yo dog ass back here damn near hung.
1998		(con. 1960s) G. Washington Blood Brothers 11: As I was walking alone without old dogass Cheese, I heard this voice coming from a small room on my right.