A bombastic or empty phrase or speech. Often used in the plural: mouthings about sin and morality. (noun)
American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Use "mouthing" in a sentence
"The books are only dangerous to children if they eat them (mouthing is okay), but because they might have some ink, it is now illegal to sell, give away or otherwise distribute (like from a library or school) any of these old children's books, unless they are rare, adult-only collectibles."
"But through the slow monotonous drag of the hours they developed a fictitious excitement and interest in mouthing their quarrel which each knew in his heart of hearts was no quarrel at all."
"However, men have been on the receiving end of bad mouthing from the backchannel, too."