spitball
noun [ C ] US uk/ˈspɪt.bɔːl/ us/ˈspɪt.bɑːl/
（咀嚼弄湿后用作投掷物的）湿纸团
a piece of paper that has been chewed and then rolled into a ball to be thrown or shot at someone
spitball
verb [ I or T ] mainly US informal uk/ˈspɪt.bɔːl/ us/ˈspɪt.bɑːl/
不假思索地发言
to quickly suggest ideas to be discussed without thinking about them carefully
I'm just spitballing here. 我就是在这里随口说说。
The writers sat around for an hour, spitballing ideas for a character. 编剧们围坐了一个小时，信口讨论着一个角色。