Sentence:  But I said to her, ‘Look, I don't know what your real feelings are towards your father, but I strongly advise you, if you've got anything to say to him, even if it's just to call him an <WSD>arsehole</WSD> again, do it now....' 
Meaning of the word marked with <WSD> tags:  An inconsiderate or mean-spirited person. "Less vulgar and intense than fucker."