Hi everyone, with the goal of making my Irish less formal - I'm wondering if anyone knows any common alternative and casual words (or even mumbles) for the likes of yes, no, is it or to agree/disagree with a sentiment.

As an example in English:
Yes - Yeah, Yupp, Yipp, Yurp, Uh huh, mmm hmmm (mumbled).
No - Nah, Nope, Nuh uh, Narhhh (Australian style!), mm mm (mumbled with the first mm higher pitched)

Or even if there are some emphatic variants people have heard - along the lines of heck yes, hell yes, god no, hell no etc.

I've heard sea/tá and ní hea/níl on the radio, but as an example you'll hear native speakers say "sea sea sea" with each extra sea getting more breathy as they agree (while someone else is still talking).
But surely there are more of these that crop up in less formal settings i.e. not on the radio.
My preference is for Munster variants but I'd love to know what people have heard from across the country.

Tá? Tá, is rud iontach é.

This tá was described by Ua Laoghaire as an introductory word, affirming the truth of what was to follow.

Old Irish "yes" was "tó" (but disappeared allegedly completely).
I wonder if this "introductory tá" might be a little rest of that.



Answers of questions could be (e.g. the verb cuir in past tense: Ar chuir tú ...?)
Chuir. = Yes (I put)
Chuireas. = Yes (I put)
Chuireas-sa. = Yes (I put)
Chuir mé. = Yes (I really did put)
Is mé a chuir. = Yes (prob. the same as before or even stronger)

But none of them is really informal.

Thank you, Labhrás. I didn't know about tó. I suspect you're right.