The word bitch technically means "Female Dog" but in this definition "Smirkish Ass Bitch" could refer to any living human who is down right fucked up in all ways, shapes, and forms. A scandolous individual who will fuck you over real quick and for any and everything they can get. Someone not to be trusted and who must be observed by others. Very sneaky.
LNBAC "aye have you talked to Brittany today I think she took something from my house and we closer and cooler than that".
Gutta "Hell naw I ain't talked to that smirkish ass bitch you know you can't trust that bitch round yo shit. YO BAD!"
This is slang specific to Richmond, California. Richmond kids say "smerkish" where their counterparts in Oakland would say shady or scandalous. Smerkish can be used as a synonym for suspicious, wrong, sneaky, unfair - regarding any person or situation where someone is being treated badly. It can be an adjective, adverb, or verb; I've even heard people say, "Aw, she smerked you."
Maliq and his boys are posted on 4th and McDonald when a car full of Northers creeps by, mugging them. Maliq says, "Watch out - they smerkish" and reaches for his gun.
Later, Maliq asks a girl for her phone number and she laughs in his face. His parnter says, "Aw, she did you smerkish, blood."