Green’s Dictionary of Slang

noodeenaw n.

[‘Irish 'Niúdar neádar' - indecision, an undecided reply, and 'Bhí niúdar neádar aige - he was hesitating'. (Dinneen). And 'Niúdar neudar' - indistinct, grumbling, indistinct muttering of any sort. (Ó Briain)’ (Beecher, 1983)]

(Irish/Cork) an insipid or annoying individual; one who is indecisive.

S. Beecher Dict. Cork Slang (2004) [ebook] NOODEENAW [...] A person of insipid or annoying character.
[Ire]L. McInerney Glorious Heresies : His mother said something about the shame of having birthed a professional noodeenaw.