get wind in one's jaws

Meanings:

• 1.

  chiefly US, Southerninformaldialectal
  • To have air in the mouth or jaws; to draw in or hold a breath in the lower face.

• 2.

  chiefly US, Southernidiomaticinformal
  • To talk excessively or indiscreetly; to blabber or speak one's mind at length.