Fluff

1. Nap or down; flue[2]; soft, downy feathers.
2. Something light and inconsequential; something not to be taken seriously; -- used commonly of literary or dramatic productions, and sometimes of people.
3. A mistake, especially in the recitation of lines in a drama.

1. To make or become fluffy; to move lightly like fluff.
   

1. To make a mistake in the performance of; -- used mostly of lines in a drama; as, he fluffed the last line of the act.