the prostrate trunk of a coconut tree(Herman Melville.The word often implies that a prone or a supine position has been assumed out of humiliation, submission, helplessness, or physical or emotional incapacity:

• 椰子树的直树干（海默 梅尔维尔）。这个词经常暗示被认为是屈辱、驯服、无助或身体或感情的无能的一种俯卧或仰卧姿势：