fluff

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun Light down or fuzz, as on a young bird or on a dandelion or milkweed seed.
• noun Something having a very light, soft, or frothy consistency or appearance.
• noun Something of little substance or consequence, especially.
• noun Light or superficial entertainment.
• noun Inflated or padded material.
• noun The parts of a junked car that are not metal and cannot be recycled.
• noun Informal An error, especially in the delivery of lines, as by an actor or announcer.
• intransitive verb To make fluffy.
• intransitive verb To ruin or mar by a mistake or blunder.
• intransitive verb To forget or botch (one's lines).
• intransitive verb Vulgar Slang To cause (a man) to be sufficiently aroused so that he is able to have sexual intercourse, especially in a pornographic film.
• intransitive verb To become fluffy.
• intransitive verb Informal To make an error, especially to forget or botch one's lines.

from The Century Dictionary.

• To treat with fluff or powder.
• noun Light down or nap such as rises from cotton, beds, etc., when agitated; flue.
• noun Something downy or fluffy.
• noun A puff.
• noun A slight explosion of gunpowder.
• To cause to puff.

from the GNU version of the Collaborative International Dictionary of English.

• noun Nap or down; flue[2]; soft, downy feathers.
• noun Anything light and downy, whose volume consists mostly of air, such as cotton or down.
• noun Something light and inconsequential; something not to be taken seriously; -- used commonly of literary or dramatic productions, and sometimes of people.
• noun A mistake, especially in the recitation of lines in a drama.
• transitive verb To make a mistake in the performance of; -- used mostly of lines in a drama.
• verb To make or become fluffy; to move lightly like fluff.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun Anything light, soft or fuzzy, especially fur, hair, feathers.
• noun Anything inconsequential or superficial.
• noun Lapse, especially a mistake in an actor’s lines.
• noun A passive partner in a lesbian relationship.
• verb transitive To make something fluffy.
• verb intransitive To become fluffy.
• verb transitive, intransitive, of an actor or announcer To make a mistake in one’s lines
• verb transitive To do incorrectly, for example mishit, miskick, miscue etc.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• verb ruffle (one's hair) by combing the ends towards the scalp, for a full effect
• noun any light downy material
• verb erect or fluff up
• noun a blunder (especially an actor's forgetting the lines)
• noun something of little value or significance
• verb make a mess of, destroy or ruin