Mick Stranahan's sister was married to a lawyer named Kipper Garth. Despite his profession, Kipper was largely inept and unsuccessful in his work. His main talent seemed to be self-promotion rather than legal skill.
This characterization highlights Garth's lack of competence in legal matters, suggesting that his reputation and ability to attract attention were his primary strengths. The quote emphasizes his focus on self-promotion over genuine professionalism.