As an Irishman, particularly Northern (the most foulmouthed of all humans, we make southerners blush) I feel I need to say something here.
Swearing is a big exclamation point on any sentance (even if its in the middle). Our accent for some reason goes into girly high pitches that even a dog cant hear when we're worked up. We need something hard hitting to convey it without squealing like stuck pigs...