Yeah - but pian sa tóin looks very much like English translated word for word

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Is fearr Gaeilg na Gaeltaċta ná Gaeilg ar biṫ eile
Agus is í Gaeilg Ġaoṫ Doḃair is binne

Apparently this is used in Tír an Fhia:

Cuireann sé pian i mo fiodán. "He annoys me" literally "He puts a pain in my arse."


Other related expressions:

Déan bearrán (ar dhuine) "deliberately annoy (sb.)"
glámhóideach "annoying"
Tá sé sách glámhóideach. "He is quite annoying."
Duine glámhóideach é "He's an annoying person."
Cuireann siad pian orm "They annoy me, give me a pain."
Séard é héin tintreach dhe dhuine. "He's an annoying person."

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Múinteoir Gaeilge - Irish Teacher
My "specialty" is Connemara Irish, particularly Cois Fhairrge dialect, but I can also speak Ulster and Munster Irish with native-level pronunciation.
Is fearr Gaeilge ḃriste ná Béarla cliste, cinnte, aċ i ḃfad níos fearr aríst í Gaeilge ḃinn ḃeo na nGaeltaċtaí.
Gaeilge Chonnacht (GC), go háraid Gaeilge Chois Fhairrge (GCF), Gaeilic Uladh (GU), Gaelainn na Mumhan (GM), agus Gaeilge an Chaighdeáin Oifigiúil (CO).

Breandán, Pota focal has this:



Although I find the translation "thorn in the flesh" not to be idiomatic English. We normally say "a thorn in your side" - which means the Irish is not an exact translation of the English, and so may be a more traditional and reliable phrase to use.