Trying to make sense of what the healer said was impossible, worse
than listening to a chattering sparrow. Thinking of sparrows distracted Coo
for a moment from her flip-flopping nerves. She took a step closer and,
trembling, pushed Burr forward.
♥Sweetness♥
Flip-flopping nerves is another way of saying the person was very nervous. It also has the same meaning as butterflies in your stomach.
?
In this context, it means bouncing between extremes.
busterwasmycat
basically jumpy, erratic in behavior. She was not at all calm. her nerves were flip-flopping, she was really jittery, nervous. flip-flopping means turning over, again and again, without any real pattern. very erratic.