Source : Webster's Revised Unabridged Dictionary (1913)

Frothing \Froth"ing\, n.
   Exaggerated declamation; rant.

Froth \Froth\, v. t. [imp. & p. p. {Frothed}; p. pr. & vb. n..
   {Frothing}.]
   1. To cause to foam.

   2. To spit, vent, or eject, as froth.

            He . . . froths treason at his mouth. --Dryden.

            Is your spleen frothed out, or have ye more?
                                                  --Tennyson.

   3. To cover with froth; as, a horse froths his chain.

Source : WordNet®

frothing
     adj 1: covered with or resembling small bubbles as from being
            agitated by beating or heating; "the bubbling candy
            mixture"; "a cup of foaming cocoa"; "frothy
            milkshakes"; "frothy waves"; "spumy surf" [syn: {bubbling},
             {foaming}, {foamy}, {spumous}, {spumy}, {sudsy}]
     2: producing or covered with lathery sweat or saliva from
        exhaustion or disease; "the rabid animal's frothing mouth"
        [syn: {foaming}, {foamy}]