Hey again, all! Hard to find time to come on here right now, aha But, to keep moving ever so slowly forward, there is one song I know that says "Go deo deo". What would this mean? Context is: "Go deo deo ní éalaiodh (?) le Paidin Ó Raifeartaigh."

go deo means "forever" , or in a negative sentence "never".
go deo deo means "forever and ever", or in a negative sentence "never, ever".

The verb éalaigh means "escape", but it is also used for other things, such as "elope" or "run away [with]", which is what it presumably means here. I'm not entirely sure, but I would think this means "Never, ever did anyone elope with Paidin Ó Raifeartaigh", since éalaíodh looks like it is the past impersonal form (i.e, "never, ever was there any eloping with him").

If the person meant to say "Never, ever would I elope with Paidin Ó Raifeartaigh", that would be:
Go deo deo ní éalóinn le Paidin Ó Raifeartaigh
or if they meant to say "Never, ever will I elope with Paidin Ó Raifeartaigh", that would be:
Go deo deo ní éalóidh mé le Paidin Ó Raifeartaigh

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

Google throws up Go deo deo ní éalóidh le...

I suppose the mé is implied (and perhaps it was éalód at some point?)

I thought that it would be along those lines Thank you for confirming! If we're wondering about the subject, the full verse is:

Cailín ón sliabh go fóill a bheas agamsa,
Blífidh sí an bhó agus ceanglóidh sí an capall dhom,
Déanfaidh sí an císte, mo chuid ime 's bainne dhom,
Is go deo deo ní éalóidh le Páidín Ó Raifeartaigh.

In that case, it would appear to be ní éalóidh sí "she won't elope" with the sí implied.

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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).

Yay! It makes sense!!!