on the hoof idiom UK informal
顺便地，草草地
If you do something on the hoof, you do it while you are moving about or doing something else, often without giving it the attention it deserves.
I've got a meeting downtown in 20 minutes so I'll have lunch on the hoof. 20分钟后我在市中心还有个会，所以只好在路上顺便吃午饭了。