adverb, adverb taking the 'to' particle, noun or participle which takes 'suru'
flustered; flurried; speechless
Describes a state of being so shocked or confused that one cannot act or speak properly. Often used with する or と.
突然の質問にオタオタしてしまった。
I got flustered by the sudden question.
彼は思いがけない知らせにオタオタとしていた。
He was flurried by the unexpected news.