The harvest custom of giving a bannock to the 'skitter in the slap'.
When sheaves were being taken into the barn yard after the harvest, no one liked to come in with the last sheaf. The last person in was given an unpleasant name, 'skitter [excrement] in the slap [gap in a dyke]'. The skitter in the slap received a special flour or bere [barley] meal bannock. The custom is still  observed.
'Skitter in the slap' was also known as 'drite [excrement] in the slap' or 'drittle [lag, walk slowly] in the slap'.