Jeff has always been the king of the hill in their hockey league.
傑夫一直都是曲棍球聯盟裡最厲害的隊員。
king of the hill－山丘之王；個中佼佼者
Origin－
During a battle, armies fought to the death to occupy the higher
ground, known as “the hills”. Control of “the hills” can often
determine the winning or losing of a battle in old times.
起源：在戰爭中，軍隊常拼命的想佔據較高的陣地，那些區域稱為“這
山丘地”，而是否控制“山丘地”，是決定一場戰爭勝敗的關鍵
因素。
It is time for you to go to bed , sleep tight and sweet dreams.
該是你上床睡覺的時候了，祝你好睡並且有個好夢。
sleep tight－好好的睡；晚安之意
Origin－
Old bed frames used ropes pulled tightly between the frame rails
to support a bed. Tightening the ropes would eliminate the
discomfort amd help one to have a good night sleep.
起源：舊式床舖是用粗繩緊綁在床架兩端，來支撐整個床，將繩子
綁緊，可以使得整晚好睡。

Joe is really in hot water now -- his girlfriend just found out he's
seeing another woman.
喬現在是難辦了，因為他的女朋友最近發現他另外還有一個女朋
友。
in hot water－處境困難、遇到非常麻煩的問題
Everybody else in the office thought my idea was great, but the boss
threw cold water on it.
辦公室裡所有的人都認為我的主意很好，就是我們的老闆給我潑冷水。
to throw cold water on something －潑冷水
（摘自EPT美語）