walkabout
noun UK informal uk/ˈwɔː.kə.baʊt/ us/ˈwɑː.kə.baʊt/
[ C ]（重要人物的）现身公众场合，出巡
an occasion when an important person walks around a public place, meeting and talking to members of the public
The princess went on a walkabout in the town centre. 公主现身市中心和民众交谈。
Idiom
go walkaboutidiom informal humorous （常因为被别人拿走而）不见了，不知去向
If you say that an object has gone walkabout you mean that it is missing, often because someone has taken it.
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。