这个用法最早源自澳大利亚土著为回归传统生活而进行的短期丛林流浪，后来普遍理解成漫无目的地走。
 
If you say that an object has gone walkabout you mean that it is missing, often because someone has taken it.
(常因为被别人拿走而)不见了，不知去向
 
My pen was here this morning but it seems to have gone walkabout.
我的钢笔上午还在这儿，但现在好像不见了。
 
It is unusual for letters to go walkabout for that long, of course, but unexplained delays of a day or two are common.
当然，信件丢失那么长是罕见的，但莫名地延迟一两天是普遍的。