1890, "actor or performer in a troupe," from troupe (n.) + -er (1). Transferred sense of "reliable, uncomplaining person" [OED] is attested by 1942, American English.
实用例句
1. Like the old trouper he is, he timed his entry to perfection.
作为一名老戏骨，他上场的时间把握得恰到好处。
来自柯林斯例句
2. For this old trouper there is still no business like show business.
