David Stifter wrote:
>> 3. No-m·thá mo mún!
> The phrase is grammatically okay (but I guess "táithiumm" would be
> more usual), still it doesn't really look OIr. to me.
Well, it's admittedly a reach. The only mention of pissing in Old or
Middle Irish that I can think of is in the sad tale of Derbfogaill:
"Tabram ar mún isin coirthe dús cia as sia ragas ind."
This at least supports using the possessive pronoun: mo mhún.
> Perhaps a construction with "éicen" or a similar word?
Perhaps take this modern version and OI-ize it?
Is éigean dom mo mhún a thabhairt.
Issum éicen mún. (?)
That would fit better in the speech balloon!