To be flustered is to lose your cool. When you're flustered, you're embarrassed, agitated, or just confused. If your pants fell down in the middle of class while you were giving a presentation, you'd probably be flustered: highly embarrassed, out of breath, and a little freaked out.

What does it mean to fluster someone?

1 : to put into a state of agitated confusion : upset The speaker was obviously flustered by the interruption. "

Is fluster a feeling?

To fluster someone is to make them feel upset or agitated. ... Use the adjective form, flustered, to describe someone when they're feeling this way. Most of us get flustered once in a while, but if you're “easily flustered,” it happens to you quite often.