adverb, noun or participle which takes 'suru'
confused; flustered; at a loss
Describes the state of being bewildered or unsure how to act, often in a situation where one feels pressure or surprise. Commonly used with する to mean 'to be flustered' or 'to not know what to do'.
See also: まごつく
突然質問されて、まごまごしてしまった。
I was suddenly asked a question and got flustered.
道がわからなくて、まごまごしていたら、親切な人が教えてくれた。
I was at a loss because I didn't know the way, and then a kind person told me.