drag your feet 拖拖拉拉地做
It is not a good idea to drag your feet when the work needs to be done.
be back on your feet （病后）恢复健康，痊愈
I am back on my feet again now.
keep your feet on the ground 脚踏实地
It's a very exciting time for the business but it's important that we keep our feet on the ground.
under your feet 妨碍；碍手碍脚
The children were running about under everybody's feet.
not put a foot wrong 从不犯错（英式为主）
When he's around, we never put a foot wrong.