Jaynee mack
Featured in The Déise Dictionary
An expression of wonder.
Jaynee mack boy, yer wan gave me a right seein tew last night, so she did!

Ahoy there. Nautical, I know. Would you like me to translate 'Jaynee mack' in use for you?
Goodness gracious, old boy, that young lady gave me a thorough seeing to last night, she most certainly did!
Any good?