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I'm not sure anyone here has done a specific list of "dirty" words, possibly because Irish speakers traditionally used more colorful expressions than just four-letter scatological words, often with a religious connection (especially involving the devil), but here are some useful sources:

I did a list of insults on the forum a while back, which you can find at this thread, and which contains some dirty words mixed into some of the insults:
http://www.irishlanguageforum.com/viewtopic.php?f=28&t=3659&hilit=curses

and a subset of that is located at this thread (which may have some different ones):
http://www.irishlanguageforum.com/viewtopic.php?f=28&t=3655&hilit=dirty+words

There is also the comical "curse engine" at this site:
http://www.smo.uhi.ac.uk/gaeilge/donncha/focal/features/mallacht/

and some Old Irish blessings and curses (among other things) at this site:
http://www.sengoidelc.com/node

I also have a list of curses which I'll add in a separate thread, so that people can add to it as they wish. There are some dirty words in some of the expressions.

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I'm not a native (or entirely fluent) speaker, so be sure to wait for confirmations/corrections, especially for tattoos.