What is crummy?

Some articles on crummy:

Helen Crummy
... Helen Crummy MBE (10 May 1920 – 11 July 2011) was a founder of The Craigmillar Festival Society (CFS), and served as the Organising Secretary for the group until 1985 ... Helen Crummy was born in Leith ... Andrew Crummy, is the designer of the Prestonpans Tapestry, and chairs the Three Harbours Festival and Prestoungrange Arts Association ...