Lots of Texans are apt to spin a tall tale on short notice, but some are prone to talking with no notice at all. An observer might note of such a 'live dictionary" or "chin musician" that "he speaks ten words a second, with gusts to fifty." The most common construction, however, is "he could talk the [blank] off a [blank]" -- maybe "the legs off a chair," "the ears off a cow,", "the gate off its hinges." This handy fill-in-the-blank form easily adapts itself to the speaker's experience or view.

She could talk a coon right out of a tree.

He's got a ten-gallon mouth.

She's got tongue enough for ten rows of teeth.

He blew in his own words.