fribble
/ˈfrɪbl/noun
1- informal a frivolous or foolish person〈非正式〉轻佻的人; 蠢人。
1.1
- a thing of no great importance无聊事; 无关紧要的事。
词源
mid 17th cent.: symbolic, from the earlier (now obsolete) verb meaning 'stammer', also 'act aimlessly or frivolously'.