なんだかんだ
なんだかんだ · nandakanda · JLPT N1 · adverb
something or other
Sounds like 'nan da kan da' - a shrug-y filler, like 'this, that, and whatnot' in English.
なんだかんだ is built from なん (what) + だ + かんだ (more of the same), so it trails off like 'something or other'. Think of it as a verbal shrug.