pump up加油打氣。pump意指「用泵打氣」，充氣之後的輪胎或氣球是不是會越來越大、越來越高（up）呢？因此pump up引申為「鼓勵」之意。另外，pump也可指「將物體快速地上下移動」，所以口語中pump iron是指舉重。
看看老外聊天時怎麼用pump up：
Gina: I' ve got some bad news. We are going to get laid off.
Eric: I know. I feel really depressed.
Gina: How did you know about that before I told you?
Eric: Bad news travels fast.
Gina: I' ll collect pogey for a few months and then try to find another job.
Eric: Me, too. Let's get pumped up together!
吉娜：我有一個壞消息，我們要被裁員了。
埃裡克：我知道，我很沮喪。吉娜：我還沒告訴你，你怎麼知道？
埃裡克：壞事傳千裡。
吉娜：我會先領幾個月的失業救濟金，再找工作。
埃裡克：我也是，我們一起加油吧！
pump up例句精選：
They find it difficult to pump themselves up for the games.
他們感到要為自己加油打氣，自信滿滿地去打比賽並不容易。
All of these can pump up your attitude.
這些都會讓你的態度變得積極。
They have cut prices in an attempt to pump up sales.
他們降低了售價，試圖通過此來促進銷售量大幅增長。
拓展學習：
morale 士氣
inflatable 膨脹的
frustrate 挫敗
discourage 使洩氣
a shot in the arm 強心針；為之振奮
spray salts into one's wound 某人傷口撒鹽