"跑龙套(pǎo lóngtào)" refers to the person who holds flags and plays the soldier’s role in the opera.

“数落”means to scold somebody by enumerating his or her wrong doings with critical tones.

"捏把汗(niē bǎ hàn )" means one’s hands sweat because he/she is nervous about something or somebody.

“节骨眼儿(jiéguyǎnr)” means the critical moment.

“后腿(lā hòutuǐ)" means to deter or hold back the advance of someone or the whole team.

"捅娄子(tǒng lóuzi)" is a derogatory term indicating someone has done something wrong or said something inappropriate that caused trouble or dispute.

“高手(gāoshǒu)”are those who excel at doing certain things or are professional in one specific field.

“幸运儿(xìngyùn ér)”refers to someone with good luck.

“夜猫子(yèmāozi)” means owls in Chinese dialect.

“左撇子(zuǒpiězi)” refers to those who are used to using their left hands to do things such as handling chopsticks or scissors.

Recently the expressions of “宅男/ 宅女(zháinán/zháinǚ)” become popular among the young people in China.

"吹牛( chuīniú)” means to talk but ignore the facts.

“小看(xiǎokàn)” means to look down upon somebody or belittle something.

"掌上明珠(zhǎngshàng míngzhǔ)" literally means a valuable pearl in one’s palm.

"出马(chūmǎ)" originally meant riding to the war field to kill enemies. It now means attending to the matter personally.

Sometimes people say "转眼间" or "转眼之间" to indicate that time passes very quickly.

“绕口令(ràokǒulìng)” is a kind of language game. It is composed by the words or phrases that have the similar pronunciations or tones.

“开夜车(kāi yèchē)”literally means driving at night and it is a metaphor for staying up late to study or work.

“玩命(wánmìng)”means to act regardless of the hazard or not take one’s life seriously. It is usually said with a mocking tone.

"白搭(báidā)" is a colloquial word. It means certain ways or ideas are of no use or inefficient.