fluff

1. N-UNCOUNT Fluff consists of soft threads or fibres in the form of small, light balls or lumps. For example, you can refer to the fur of a small animal as fluff. 绒毛

The nest contained two chicks: just small grey balls of fluff. 窝里有2只小鸡：还只是两个灰色的小毛球。

2. V-T If you fluff something that you are trying to do, you are unsuccessful or you do it badly. 把…搞糟[非正式]

She fluffed her interview at Harvard. 她把哈佛的面试搞糟了。