Source : Webster's Revised Unabridged Dictionary (1913)

Blurt \Blurt\ (bl[^u]rt), v. t. [imp. & p. p. {Blurted}; p. pr.
   & vb. n. {Blurting}.] [Cf. {Blare}.]
   To utter suddenly and unadvisedly; to divulge
   inconsiderately; to ejaculate; -- commonly with out.

         Others . . . can not hold, but blurt out, those words
         which afterward they forced to eat.      --Hakewill.

   {To blurt at}, to speak contemptuously of. [Obs.] --Shak.