She came in flustered and apologetic, a touch of anger in her face.

NEWYORKER: Tenth of December

Mother got flustered when she heard anyone telling a joke.

NEWYORKER: Mr. Bones

She stammered a little, understandably flustered.

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Like many Chinese students in the U.S., Ms. Lu disliked writing essays and got flustered after being scolded by a professor for reasons she didn't understand.

WSJ: Chinese Pour Out Grief for Student