loose informal trousers that fit tightly around the ankles, are often made of thick cotton, and are worn for running or are in the style of trousers designed for running

His usual day wear is a T- shirt and jogging bottoms. 他通常都穿着T恤衫和慢跑裤。

I can't imagine her sitting around in an old pair of jogging bottoms. 我无法想象她穿着一条旧的慢跑裤坐在那里的样子。