The poodle walked around the park with a prancy gait, showing off its lively attitude.

prancy 是形容词，由动词 prance（趾高气扬地走）加上形容词后缀 -y 构成。prance 本身描述马匹等动物昂首阔步的行走姿态，引申为"神气活现地走动"的意思。prancy 形容一种轻快活泼、带着炫耀意味的步态。