(Picture are used for representation purpose only) Warn him: There are times when a flirt who refuses to give up in spite of being ignored tries to find new ways to talk to the girl. Is that exasperating? You bet it is. When a girl cannot take it any longer, the right thing to do is be upfront and tell the bloke to get lost. If the flirt is chasing the girl at the workplace, for instance, the girl can tell him that she will have to take it up with the HR. But a girl ought to take such an extreme step only after warning the chap, since there is always that one percent chance that he just had a bad sense of humour and doesn't know where to stop.