Sentence:  'What did you just do?' Sunshine asked. 'Did you just kill a moth?' / 'No,' he said. He glanced at it then flicked it off. Shimmering dust filmed his skin. ... / 'Sometimes you are such a <WSD>ratfink</WSD> jackass,' she told him, throwing his hand down, some of the shimmery dust on her own fingers. 
Meaning of the word marked with <WSD> tags:  A dislikable or contemptible person. (from 1960s)