The Isle of Man Notebook (https://www.isle-of-man.com/manxnotebook/iomnhas/lm3p134.htm) records when talking about glashtins:
"At Cregneish, in former years, they used to have a kiln for drying the corn, which they fired. Well, once the wife of a Glashtin was seen roasting a piece of fish, and she was saying to him : ‘Roas’, Kissack veg, roas’ ‘—telling the fish to roast. [" The Kissack or Skissack is a fish like a mackerel in shape, and common in the Sound ; in English it is termed ‘Kellag,’ the smaller size is called Kissack, the bigger Strammian, and the biggest Gardash."]