ADJ
(讲话、动作)不经意的，随意的
If you say that someone makes a throwaway remark or gesture, you mean that they make it in a casual way, although it may be important, or have some serious or humorous effect.
例句
...a throwaway remark she later regretted...
她脱口而出后就后悔的话
The humour and throwaway lines ensure that the piece never loses its pace.
幽默和即兴的台词确保了这出戏自始至终的流畅。