关公面前耍大刀

1. • lit. to wield the broadsword in the presence of Lord Guan (idiom)
2. • fig. to make a fool of oneself by showing off in front of an expert

Character by character

• 关(guān)surname Guan
• 公(gōng)public
• 面(miàn)face
• 前(qián)front
• 耍(shuǎ)surname Shua
• 大(dà)big
• 刀(dāo)surname Dao