The Irish for f@#k is foc. Foc seo (this). Foc sin (that).
You get the foc-in point? Yeah? Tommy Tiernan (watch video below) is a comic, sure, but a philosopher too, a philosopher about what it means that some Irish punctuate nearly every sentence with foc.
I won't ruin the punch line, but Tiernan's diagnosis of Irish anxiety within the hierarchy of English dialects is foc-in deadly.