To rub one's fists and wipe one's palms, indicating eagerness to start a task or fight.
形容战斗或劳动之前，人们精神振奋，跃跃欲试的样子。
元·康进之《李逵负荆》第二折俺可也摩拳擦掌，行行里按不住莽撞心头气。”
The team was rubbing their fists and wiping their palms before the championship game.
Learn the next connected idiom: 摩拳擦掌 (mó quán cā zhǎng) → 掌上明珠 (zhǎng shàng míng zhū)
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