别指望她能记住约会时间，她是个十足的糊涂虫。

Don't count on her to remember the appointment—she's a total ___featherhead.

我姐姐是个没头脑的人，总是想些愚蠢的点子逗我们笑。

My sister is such a ___featherhead, always dreaming up silly ideas to make us laugh.