Not just to Merkins - same effect in real English too. Except I’m quite surprised that Merkins know the English word that the Oirish “third” sounds like! Lots of Brits don’t really know it - it’s a bit agricultural (specialist vocab )… though not, I’d say, deemed mega-rude/offensive among those who do know/use it. Much less rude than “s**t”, probably about in proportion to how much it is used/known compared to the latter (v well known & much used)! Maybe a little ruder than “pooh” and more used in relation to cattle and dogs than babies…
The link from the webpage you gave is just to the same YT clip with the same license restriction.
)… though not, I’d say, deemed mega-rude/offensive among those who do know/use it. Much less rude than “s**t”, probably about in proportion to how much it is used/known compared to the latter (v well known & much used)! Maybe a little ruder than “pooh” and more used in relation to cattle and dogs than babies…