fulminate -- Mom

ful·mi·nate   (flm-nt, fl-) v. ful·mi·nat·ed, ful·mi·nat·ing, ful·mi·nates v.intr. 1. To issue a thunderous verbal attack or denunciation: fulminated against political chicanery. 2. To explode or detonate. v.tr. 1. To issue (a denunciation, for example) thunderously. 2. To cause to explode. n. An explosive salt of fulminic acid, especially fulminate of mercury. [Middle English fulminaten, from Latin fulminre, fulmint-, to strike with lightning, fromfulmen, fulmin-, lightning that strikes; see bhel-1 in Indo-European roots.] fulmi·nation n. fulmi·nator n. fulmi·na·tory (-n-tôr, -tr) adj.

The American Heritage® Dictionary of the English Language.

As a Southern lady, Mom is not one to fulminate against foolishness (at least not in public.)