mouthing

1. gerundparticiplepresentpresent participle and gerund of mouth
2. gerundparticiplepresentpresent participle and gerund of mouthe

plural mouthings

1. especially sign languageThe act of forming a shape with the mouth.

   Mouthings tend to occur most often when signers are manually articulating nouns, open-class items, and morphologically simpler signs (see Crasborn et al. 2008).

   2013, Robert Bayley, Richard Cameron, Ceil Lucas, The Oxford Handbook of Sociolinguistics, page 382

2. Ranting; passionate speech devoid of meaning.

   Kearn did not rant, he did not deafen you with heroics and empty mouthings.

   1941, Players Magazine