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.