"vigor, energy," 1912, shortened form of pepper (n.), which was used in the figurative sense of "spirit, energy" from at least 1847. Pep rally is attested from 1945; pep talk from 1926. To pep (something) up is from 1925.
雙語例句
1. Powell spent the day giving pep talks to the troops.
鮑威爾花了1天時間為部隊作動員講話。
來自柯林斯例句
2. The Democrats held a pep rally on Capitol Hill yesterday.
民主黨昨天在國會山召開了競選誓師大會。
來自《權威詞典》
3. I gave him an extra dose of glucose to pep him up.