- 叫苦不迭 (jiào kǔ bu dié)-To complain incessantly. 叫: to cry out, to shout. 苦: hardship, suffering. 不: no. 迭: repeatedly, frequently.
例句: 王太太對購物、血拼的愛好讓皮夾子縮小的王先生叫苦不迭。
Example: Ms. Wong’s love for shopping has led to many complaints from Mr. Wong, who holds a shrinking wallet. - 匪夷所思 (fěi yí suǒ sī)-Unthinkable or extraordinary actions or ideas. 匪: same. 非 (fēi), not. 夷: ordinary. 思: think.
例句: 這件謀殺案令人匪夷所思，十年了還是解不出來。
Example: This is a difficult murder case that has yet to be solved even after ten years. - 唯利是圖 (wéi lì shì tú)- To seek personal profit over everything. 唯: only. 利: gains, profit. 圖: to covet, to seek.
例句: 此公司的創辦人唯利是圖，不在乎廉價材料和低廉的品質仍以高價出售產品，賺取高盈利。
Example: The founder of this company seeks profit over everything, selling his products at high prices with high returns despite their cheap materials and l0w quality. - 得不償失 (dé bù cháng shī)- The gains do not make up for the losses. 得: to gain. 不: not. 償: return, to compensate. 失: to lose.
例句: 失戀後她連續睡了好幾個星期，課也沒去上，結果影響了成績。真是得不償失。
Example: After her breakup, she slept for weeks, missing her classes and thus affecting her grades. So not worth it. - 打草驚蛇 (dǎ cǎo jīng shé)- To inadvertently alert an enemy. 打: to hit. 草: grass. 驚: startle, alert. 蛇: snake.
例句: 玩躲貓貓時千萬不能出聲，打草驚蛇，免得被找著。
Example: In the game of hide and seek, you must not make any sounds to alert the seeker, in case of getting caught.
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References used:
MDBG Chinese-English Dictionary http://www.mdbg.net
Yahoo 奇摩字典 http://tw.dictionary.yahoo.com
Bai Du 百科 http://baike.baidu.com
國語日報辭典
Their Words. Your Voice. 