Swilkie Greetings Card Swilkie definition card Caithness dialect is a northern form of Scots and I have created a series of cards with the definition of popular words used in the area. This card is the definition of 'Swilkie' the name of the large whirlpool off the coast of Stroma. If you would like cards only posted there is a cheaper postage rate available for £1.50 First Class Royal Mail at the checkout. Made with high quality 150mm by 150mm smooth matt 300gsm card and includes a high quality kraft envelope and a biodegradable acetate sleeve. Blank inside for your own message. FSC Mixed Sources certified. Produced at a mill that is certified with ISO14001 environmental management standard.