stem-winder
/ˈstemˈwaɪndə(r)/noun
US <美>
1
- informal an entertaining and rousing speech〈非正式〉令人愉快和振奋的演讲：
a stem-winder of a speech.
一次令人愉快并且催人奋进的演讲。
2
- dated a watch wound by turning a knob on the end of a stem〈旧〉发条表。
词源
sense 1 from the notion of 'winding up' or causing a lively reaction from those listening.