Duffy uses a metaphor in which a feeling is compared to a skelf. Just as a skelf is a tiny splinter, so too Duffy felt only a small amount of shame when her brother swallowed a slug. This is effective as it shows that she has adapted to her new home. The use of the Scottish word “skelf” does, however, show that she still feels a connection to her old home and Scottish identity and she hasn’t forgotten her roots.