She got all squirrely before the presentation, fidgeting with her hair constantly.

squirrely 是由名词 squirrel（松鼠）加上后缀 -ly 构成的形容词。松鼠的特点是活泼好动、容易受惊，所以 squirrely 引申为"紧张不安的、坐立不安的"意思，形容人像松鼠一样躁动不安的状态。