Could you help me understand the last sentence of the following passage?
"Hey," I say, "what happened with you guys when I saw you running out of Namn's Christmas Eve?"
Arnie laughs. "The bulls was on our ass."
"Catch you?"
"Hell no, man! Friggin' bulls..."
Ding Dong laughs. "All them creeps in that store to steal from, Arnie's got to pick out a lady bull to clip!"
(Charles Perry, Portrait of a Young Man Drowning)
It is hard for me to understand the "All them creeps in that store..." part because of many slang words(?). I appreciate any comments.